DarkLordOfOptics
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Riflescope Type Classification

In the aftermath of SHOT, looking at different forum discussions, we seem to be getting into a little bit of a classification issue when it comes to different riflescope types. All sorts of terms get thrown around: LPVO, MPVO, Crossover, Mid-range, Long-range, Precision, Target, etc.
This confusion is not surprising. There is a lot of overlap between all these different configurations and nothing is clear cut. On top of that, it is not like anyone ever bothered to fully define them. I am as guilty of that as the next person, since I have talked about a few particular ones, but never really thought through the entire landscape. Let's give it a shot and let me know if this makes sense. I am going to first list the terms that come to mind and then keep revising this post with definitions as I think through them. Please offer your thoughts in the comments on what you think the definitions should be and whether you think additional terms should be added to the list:

1x Prismatics and RDS

Small Prism Fixed Power

Large Prims Fixed Power

LPVO
LPVO stands for Low Power Variable Optic and it is the easiest of the bunch to define. A riflescope with the magnification range tat goes down to 1x is it. If it works well on 1x, it is a good LPVO. If it does not, it isn't. I often use these as DMR scopes and they do crossover into a few other niches, but the default position of the magnification ring is 1x. I have a few of these here. If you have money to spend, Vortex Razor Gen3 1-10x24 should be on your list https://bit.ly/3w1Ah2T. If you can spend some cash and want the smallest package, that's Primary Arms PLxC 1-8x24 https://bit.ly/3Bn3951. If you want something that leans a little more in the DMR directions, Delta Stryker 1-10x28 https://annexdefense.com/delta-stryker-hd-1-10x28-rifle-scope-do-2517-1-10/. If you are new to LPVOs, Primary Arms SLX 1-6x24 with Nova reticle https://bit.ly/40LeLdt or one of the new SwampFox LPVOs with fiber reticles. I have a few LPVO recommendations (click on the recommendations banner on the right). Depending on how the scope is set up, these can have either SFP or FFP reticles.

Dangerous Game
This is another simple one. It used to mean a light, compact and durable scope of low power that can hold up to the recoil of large caliber hunting rifles. It still means that, but we can add more specificity to it. In the modern world, it is a lightweight LPVO with a high visibility SFP reticle. The reticle is typically a fairly simple pattern. The emphasis, again, is on excellent low power performance. The overall trend with LPVOs is to higher erector ratios. For a DGR scope, I am perfectly fine with a high quality 1-4x. The one additional quirk here is that while for typical LPVO applications, we do not care a ton about long eye relief, for a dangerous game scope, long eye relief is a good thing. Tract 1-8x24 is a good example here. Delta Titanium HD 1-6x24 and Stryker HD 1-6x24 fit the bill very well. Trijicon Accupoint 1-4x24 https://bit.ly/3utRSQu or 1-6x24 https://bit.ly/3OvH0Zo with a post reticle would likely be at the top of my list. Interestingly, the newly announced SFP version of the Primary Arms PLxC 1-8x24 might become the go to choice for this. It has very high build quality and spectacular 1x performance. I should put it onto a lightweight magnum and see if it survives.

MPVO
This is likely to be a more controversial definition than most. To me, this is a FFP scope with low end magnification of 2.5x or less, locking or covered windage turret and zero stop elevation turret. Sidefocus knob is preferred. Reticle should be an illuminated tree type of some sort. This scope is equally likely to be dialed with as held with. It has to work well with a clip-on, so I want the low end FOV to be 8 degrees or wider and I want the overall length to be moderate. 12.5" or less would be great. The reticle has to work well on all magnifications. The hold marks on the tree reticle have to be usable from about 7x on upward. Top end magnification is not critical, but ideally I want it at 10x or more. Objective lens diameter should be in the 32 to 44mm range. Smaller diameter objective scopes are easier to make short. Weight has to be moderate as well, ideally under 25 ounces. These scopes are excellent for DMR use on accurate semi-autos. They work equally well on compact and accurate bolt action rifles. Arguably the purest expression of the MPVO genre is March 1.5-15x42 and it currently sits on my 16" barreled 8.6BLK bolt action Fix: https://bit.ly/4bjm15X The best budget option we have for the time being is Athlon Helos BTR Gen2 2-12x42 https://bit.ly/40i1ABe The new Leupold Mark 4 2.5-10x42 is likely to be a good contender as well, although the reticle is a little suspect https://bit.ly/3StVvhy If you are a MOA shooter, Burris' new 2.5-12x42 Veracity PH, while aimed at hunters, is a very strong offering for this category as well https://bit.ly/4939QII

Tweener
Tweener scope is a term I have been using for many years. Long enough where I do not know whether I coined it or whether I lifted it somewhere else. These are smallish SFP scopes with 32 to 38mm objective diameter that were originally meant for eastern hunting, but lend themselves surprisingly well to a variety of applications. They are a perfect case of "less is more". While we tend to think of them as short range numbers, I shot my first elk with a muzzleloader wearing the now discontinued Vortex Razor HD-LH 1.5-8x32 at a bit over 300 yards. The fun part was that the guide who was with me, also had a muzzleloader with him. We ended up getting back to the truck with a field dressed elk and two loaded muzzleloaders. Rather than drive with them, he suggested a simple one shot competition. We located a rock around 500 yards from us. Whoever got closer to the rock, won. He had a fancy Gunwerks muzzleloader and a 6-24x scope with exposed elevation turrets. My muzzleloader has a fancy Arrowhead barrel on an Encore action, so not too shabby either. He got close. I hit the damn rock. Not bad for a couple of muzzleloaders in 15mph shifting wind. Tiny scope with "only" 8x on the top end did not hinder me one bit. This is not a popular scope category, but I always wonder why people do not use these more with thermal clip-ons. I do. On the low end are the ~$200 Vortex Diamondback https://bit.ly/3SGMWBb and Burris Fullfield II. There is an update coming from Burris as well. Leupold's original 2.5-8x36 was probably my inspiration for defining this category a couple of decades ago. It still lives on in a slightly refreshed form: https://bit.ly/3EV1hTx
If I ever start an optics company, I'll bring back that Razor HD-LHT 1.5-8x32 except with an illuminated dot.

Crossover
This is another category that is somewhat arbitrary, yet fairly self-explanatory. These are the riflescopes that almost equally comfortable on western hunting rifles and on competition rifles. The purest expression of the genre is likely Vortex Razor HD-LHT 4.5-22x50 https://bit.ly/41uPd5v. For this category I am looking for a FFP scope that is under 30 ounces in weight. Top end magnification of 15x or more. Bottom end magnification of 5x or less. Illuminated reticle of either tree or scale type. Overall length is not critical, since I am not hugely concerned with clip-on use, but a something of moderate length is not a bad idea. Zero stop elevation turret with rev counter paired with a covered or locking windage turret. Elevation turret lock is a good thing to have, but not strictly speaking critical. Burris XTR3i 3.3-18x50 https://bit.ly/3XVF8Ld and Delta Stryker 3.5-21x50 https://annexdefense.com/delta-stryker-hd-3-5-21x44-rifle-scope/ are other good examples of what I mean here. The newly announced Leupold Mark 4HD 4.5-18x52 should be a contender as well, but I need to spend some time with it before I make recommendations https://bit.ly/42wNDAo

Traditional Hunting
This category might be unexpectedly controversial because hunting is so different in different parts of US. It can be a 50 yards shot in the wooded areas of the Eastern seaboard or a 500 yard shot in the mountains of Wyoming. I lean toward the Crossover category above as the better choice for long shots out West. Traditional hunting scope, to me, lean toward moderate magnifications and distances that are largely within the MPBR of the cartridge. Historically, it was a 3-9x42 or 2.5-10x42 design with a simple-ish SFP reticle. Some people still preferred FFP reticles. I can go either way on this one. Some of my favourites here are SWFS 3-9x42 (FFP), Delta Titanium HD 1.5-9x45 (SFP), Vortex Razor HD-LHT 3-15x42 (SFP) https://bit.ly/49tk3xX , Leupold VX-5HD 2-10x42 https://bit.ly/49q0xCu , Trijicon Accupoint 3-9x42 (SFP) https://bit.ly/49tk3xX , Trijicon Accupoint 2.5-10x56 (SFP) https://bit.ly/42v7MXz. For these designs, I want low end magnification to be no more than 3x. Reticles have to work well on all magnifications. Duplex and #4 reticles both work well, but a simple mil-hash reticle like SWFA and Vortex Razor have are a good idea. Traditional MilDot with good illumination works well here.
Generally, illumination is not required, but nice to have.

General Purpose Practical Precision
This is typically a FFP riflescope with a 50mm or greater objective diameter. The conventional wisdom here would call for top end magnification of 20x or higher, exposed elevation and windage turrets of 10mrad or more travel per turn and a fairly sophisticated reticle. This category overlaps with crossover scopes above and long range precision below. On the low end of the magnification range, I really do not want go above 6x and keeping it at no more than 5x is better. Overall elevation adjustment range does not have to be huge. This is not a scope that has to perform ELR heroics of all sorts, although quite a few of these do end up pressed into odd applications (hence "general purpose" ) Depending on the price range, I like to have reticle illumination, but for reasonably inexpensive models I can live without it. I do want to be able to use the reticle (as a simple aiming pattern, not the tree) on low power, so an ultra thin design is not ideal here. If money is no object, S&B Ultra Short 5-20x50 with DTII+ turrets and MSR2 reticle is very hard to overlook https://bit.ly/3usGynQ On the more budget side of things, Tract Toric UHD 4-25x50 is an interesting option, especially if you do need the adjustment range https://tractoptics.com/toric-4-25x50-34mm-mrad-elr-rifle-scope. Personally, I can easily live with a 3-15x50, but it seems like 20x or more has become the market standard. To that end, if equipped with a reasonable reticle, many larger scopes fit the bill here, like the Element Theos 6-36x56 https://bit.ly/3t2MMtn and Leupold Mark 5HD 5-25x56 https://bit.ly/49s2sX3

Long Range Practical Precision
This is a little bit like the category just above, except these are almost never used for shooting on low power and I do not think I have ever seen one used below 8x. Most of these scopes are large and heavy. Most of the shooting with these happens on 15x and above. Sometimes you will dial down when scanning and looking for something. Thinner reticles are common in this category. Exposed elevation and windage turrets are nearly default. Adjustment range usually sits at 30mrad or higher. These scopes tend to be heavy. The better ones out there have excellent optical performance across the entire elevation adjustment range. Traditionally, these have been the excellent 5-25x56 designs starting with the S&B 5-25x56 https://bit.ly/3uuJDnq and branching out into a good number of options. Tangent Theta 5-25x56 https://bit.ly/3uvxqim is probably the best this configuration has to offer. More recently, 7-35x56 and 6-36x56 has become more commonplace with S&B https://bit.ly/45edsox and Vortex Razor Gen3 6-36x56 https://bit.ly/3Sa6M87 arguably leading the charge.

Short Range Target
This is not my field, to be honest with you. Still, this usually involves trying to shoot very tiny groups or hit very tiny targets all at comparatively close ranges, usually inside of 200 or 300 yards. For some distances, it is shorter than that. However, the angular size of the targets you have to hit or groups you have to make is astoundingly small. Because you are looking through comparatively little air, this is where you can work with a LOT of magnification. Some disciplines have weight limitations, so lighter weight of fixed power scopes is often an advantage. For target shooting, if you have the funds, something from March labeled "High Master" is your best bet, the 48x52 fixed power, for example: https://bit.ly/3OGI0K6 Of the more reasonably priced options, Sightron has a couple of fixed power scopes (36x45 and 45x45) and several excellent variable scopes in SII and SV lines that do very well in this discipline. Thin reticles are a benefit here, so SFP designs pretty much own paper shooting. These scopes have exposed elevation and windage turrets with very fine adjustment granularity being an advantage. 1/8MOA is most common since most of these scope are in MOA. If you are a mrad shooter, 1/10mrad clicks are worthwhile.
Airgun Field Target competitions are sorta "short range target", but deserve their own section.

Long Range Target
This is kinda like the section above except you are looking through a LOT of air since the targets are far away. Given that air quality can be all over the place, you want a variable design, usually something that goes above 40x. Again, this is where March might be king of the hill with the new 8-80x56 High Master https://bit.ly/4bxMuwA, but there are reasonable options out there from Vortex, Delta, Sightron, Nightforce, etc. F-Class guys seem to live on 40x, but depending on what mirage is doing, you want to have the ability to adjust magnification.

Field Target scopes
This category is an odd mix of short range target and practical precision. You shoot at very tiny targets that are not that far away. The problem is that you shoot with tiny airgun pellets that have a lot of drop. Those tiny targets are sitting at unknown distances. Field Target competition is, to be honest, a blast and is probably the fastest growing precision shooting discipline we have. F/T scopes are calibrated at particular distances using the side focus turret. During competition, you use the side focus to measure the distance to the target and dial for trajectory. Shallow depth of field is a huge benefit for this, so high magnification helps. It is also very important for the optomechanical system to be athermal so that your side focus calibration does not change with respect to ambient temperature.
Think High Power Sightrons and Marches.

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Vortex Defender XL Green

This is the second time Vortex' Defender XL crosses my path. I was very impressed with the original red dot version, so I was curious to see how the one with the green dot works for my eyes.
To get the details, see the attached video.
The cliff's notes version is that I am just as impressed with this one. In terms of collimation quality and parallax control, it is quite exceptional.
https://alnk.to/881BEV1

00:10:20
Primary Arms HTX-1 US Made red dot sight

I've had this RDS for a bit over two months now and I am beyond pleased with it.
Despite some spirited abuse, it keeps soldiering on.
https://alnk.to/1C9z5dw
It is a very nice RDS and being fully made in the US does not hurt either.

00:13:03
Delta Stryker 3.5-21x44 Wrap-up

This scope comes up a lot since I really like the configuration. It is time to do a final wrap-up of it.

It is one of my favourite scopes on the market today, especially for the money, since I naturally lean toward general purpose-ish designs. Still, while the 3.5-21x44 Stryker is relatively compact and light, it still clearly leans toward the precision side of things, which suites me very well.

https://annexdefense.com/optics-and-optic-accessories/delta-optics/

00:10:25

I was a bit confused at the beginning but this is a new Model looking at the turret compare to old LH2-10x40,
Any news on this ?
https://www.amazon.com/Vortex-Optics-Razor-Second-Riflescopes/dp/B0FBMNTW52?th=1

Updates, deals and new review items: PLxC RDB, Zeiss Tripod, etc

As the week is coming to an end, I find myself in an unusual place: home.

I plan to be home between now and September 1st when I have to go to Israel for ten days, returning on the 11th (dayjob stuff).

For the last couple of months, between family vacations, work and a couple of matches, it seems like I only spent enough time at home to check zero on my 6.5CM Fix and head out again (it has not shifted, thank you Area 419 mount).

I have a lot to do during the next two weeks, but I will try to take some pictures, film some footage and release it as I go along. I can edit videos on the plane or in Israel just about as well as I can at home.

While generally, I am very picky about what I accept for review (given my bandwidth limitations), I do have a few new things here worth talking about.

One is Primary Arms new PLxC RDB 1-8x24 LPVO. It is essentially a version of the original FFP PLxC LPVO except with different reticle illumination technology. The new model utilizes diffractive reticle illumination (same style ...

Had to switch to a different streaming service

Rumble Studio crapped out on me. so I hadd to stream using a different service

post photo preview
Steiner C35 Gen2 Mount
from Annex Defense

The production version of the Annex Defense's mount for the Steiner C35 Gen2 thermal Clip-on is finally here.  At $1600 (when this is published), the clip-on is an absolute steal.

I've had it for a few days, but, me being the good old paranoid me, I spent some time shooting with it before posting anything.  I had a couple of days with it prior to last weekend's match in Montana and a couple of days after.  Another to pop it on and off a few times and get a couple of hundred rounds of 6.5Grendel through the gun to see if anything shakes loose.  So far so good.

The C35 Gen2 clip-on is sitting on my 6.5Grendel AR as a part of a long running "Only One" project that I have.  It pairs perfectly with the Steiner H6Xi 2-12x42 scope.

Here is what comes in the box from Annex Defense:

The order in which the whole thing comes togethe is pretty stragihtforward:

-slide the thermal washer onto the threaded interface extending out of the back of the clip-on

-spin the mount itself onto the threaded interface (the mount is threaded on the inside) until it can go no further

-rotate the mount so that the clip-on is properly lined up to the picatinny clamp

-once you are happy with the alignment, use the three nylon tipped set screws (you'll need an allen wrench for that) to lock in the position of the clip-on in the mount.  You need very little torque on the set screws.  They are there for one reason and one reason only: to keep the mount from spinning when you tighten the timing nut in the next step

-spin the timing nut onto the threaded interface of the clip-on to lock the mount in place.  You should not need the timing nut wrench, but one is in there just in case.

Here are the pieces laid out in the order in which you will need them.

When you are done, it should look like this:

Note that the mount normaly comes with two T20 screws.  I am using two thumbscrews instead, since I am popping the mount on and off all the time.  It seems to be staying put with the thumbscrews just fine.  I am hoping Annex will offer the thumbscrews as an option.

It is not quite an equivalent of a QD mount, but we needed something with an extremely low profile clamp to fit under scopes with fairly large objectives.  As is, the mount works with most scope that have objective lens diameter of 50mm or less.

I am using with with Steiner H6Xi 2-12x42 and the two work together exceedingly well.

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Scoping Gas Guns
an interesting question that acme in via PM

I received this question via a private message and thought it was interesting enough to answer it in some detail.  I have been thinking a lot about appropriate optics for gas guns recently, so this came it at the right time.

 

Here is what I ahve been messing with last few days:

 

Above: 18" WOA barrel 5.56 AR-15 with Burris XTR PS 5.5-30x56 on it.

Below: 22" Satern barrel 224Valkyrie AR-15 with Delta Stryker 3.5-21x44 on it.


For obvious reasons, I am not posting who asked the question, but what I'll do is send him a link to this article, so that he gets an answer and we might have a good discussion.
Here is what I received:

Had a question for you
I have a Knights Armament SR25 6.5CM with a 14.5" barrel - I plan on shooting 100 - 600 yards at targets at 100 yd intervals
I am favoring the TT 315P with an Aimpont Acro mounted on top -( see you liked the TT315M) - would that be enough magnification?
I saw the SB SB 5-20 which offer more top end - I like the turrets on the Tanget and tooless Zero - what are your thoughts between the 2?
If I stayed 400 and under - how do you see the TT315P with the Acro Red dot against the SB 1-8 Short Dot (saw your review on that)

There isn't really enough information in the question for a simple answer, so let's consider a couple of options.

What is the gun for? 

For shooting medium range (out to 600) with occasional close range use?  If yes, go with a conventional scope and offset or piggybacked RDS.

For shooting at close distance with occasional med/long range use? If yes, so with a nice LPVO like the above mentioned S&B Short Dot 1-8x24 https://alnk.to/3J8vlFv.  It is quite capable at long range, but where it will really knock your socks off is up close and personal.

The question of what is enough magnification is pretty personal.  For me, 3-15x is plenty, but I shoot a lot off of the tripod and off of barricades which likely influences my decision.  For that, my 3-15x50 TT315M Tangent works great and 6mrad of elevation is plenty.  https://alnk.to/gVNkUXB  175gr #08 out of a shoter tube will drop in the 5 to 5.5mrad range at 600 yards.

For a dedicated long range semi-auto, other than the looks, there isn't much downside to a larger scope, which is why I set up Burris' XTR PS on the 5.56 AR pictured above.  It is for my son to learn to shoot at distance and to us in next year's BOTC match.  https://alnk.to/gp33YuR

If I were setting up an accurate semi-auto and wanted a high mag scope for it, I would likely lean toward March 4.5-28x52. https://alnk.to/dLjHgjh  It is compact, relatively light and very good optically for any use other than the dead of the night (for which we should be using clip-ons anyway).

S&B Short Dot is a very nice scope, but March is a newer design and, other than the lowest light, has an edge in terms of image fidelity and stray light control.

TT315P Tangent is a veyr ncie scope and toolles turrets are appealing.  However, there is a weight penalty to that.  For me, that was not worth it.  I ahve 5-25x56 and 7-35x Tangents and those toolless turrets are spectacular.  However, in a 3-15x50, I am quit ecomfortable with simpler 6mrad per turn knobs on the TT315M.

 

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A morning with a chronograph

When I tell people that I am using Hornady's factory ammo for matches, I get occasionally surprised looks.  Occasionally.  Most of the time, I get fairly condescending looks from handloaders who would not let a factory round pollute the chambers of their precision rifles if their lives depended on it.

To be fair, if I had the time, I might be reloading as well.  I might be able to do better than modern factory ammo, but the truth is that I am not a quarter MOA shooter, so a lot of that would be lost on me.  The UKD matches I fidn most interesting can be done by a competent shooter with a 1MOA gun.  I am working on that first part.  I reload when I have to, but if I can get factory ammo that's not outrageously expensive and that shoots well, I will go with that every time.

I looked around and realized that I have about 600 rounds of Hornady 147gr 6.5CM factory ammo from two lots.  400 rounds from one that I will use during the match later this month.  The remainder I will likely use up practicing prior to that.

I woke up early and snuck out to the range while my family was still asleep earlier today.

I set up in the 100 yard tunnel we have.  I took my four shots to zero with the lot I plan to use for the match.  Then I fired a six shot ~0.7MOA group.  That's accurate enough for my purposes.

Here are the chronograph results:

It is slow, but accurate and consistent.

Then I shot a five round group of Hornady 147gr ammo from the other lot.

Both of those lots are not too shabby for factory ammo.  POI was within 0.2mrad between the two lots, all laterally.  

 

I had some other ammo on hand, so I fired two five shot groups with Berger 144gr hybrid target ammo and Sako TRG 136gr.

Here is what I got for five rounds of Berger:

That's not a ton of statistics, but it is a data point.  The group was ~1.1MOA

 

Here the data for the Sako TRG 136gr ammo:

This ammo showed some mild pressure signs, but not too significant.  

Again, this is not a ton of data, but Hornady is looking pretty decent here.

I'll repeat the zero retention and consistency tests a couple more times between now and June 18th when we head to Wyoming.

I might pick up a couple more boxes of Hornady 147gr from a different lot to get some more data.

More to come.

 

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