DarkLordOfOptics
Politics • Science & Tech • Sports
Guns, Optics, 2nd Amendment and resisting the Left in everything they touch.
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The value of redundancy

It so happens that looking at what people discuss on various internet forums turns out to be exceedingly informative, especially if you are looking for something to dig a little deeper into. Ideally, I look for various nonsense ideas that I can try to dispel, but this case. I simply want to point out something that does not get enough coverage. This actually popped up in a discussion with another writer/blogger behind the scenes. He is working on a podcast episode with an exceptionally well respected and experienced shooting instructor (I'll post the link to the podcast when he publishes it) and somehow our conversation touched onto the value of redundancy in your optics set up.
It happens to be the subject I have been thinking about anyway as I continue exploring different ways to set up optics on AR-15s and other semi-auto rifles.
I have different rifles set up in a myriad ways so that I can cycle between them and get a feel of how they work, how much additional training is required to get all the different sighting options involved, etc.
For example, here are a few different configurations I am currently running:
-LPVO with offset Zero Bravo iron sights
-red dot sight with flip-to-side magnifier and folding BUIS
-holographic with flip-to-side magnifier and offset SeeAll sight
-prismatic with piggybacked micro RDS
-prismatic with offset micro RDS
-MPVO with piggybacked RDS
-fixed 10x scope with offset micro RDS
-precision scope with offset RDS

I keep on hearing the discussion raging between different sighting systems that is really focused on speed, but not nearly enough is said about redundancy.

Why would you add an offset RDS to an LPVO for example? We can have a nice discussion about speed, of course, but if you have a secondary sighting system, you might not be entirely dead in the water when (note I said when, not if; eventually everything breaks down). It won't even have to completely go down.

On modern LPVOs with ultra bright reticle illumination, battery life is measure in tens, sometimes hundred of hours.

With modern high quality red dot sights, I can comfortably leave them on for a year or more an not worry about batteries.

The next logical step, though, is how far do we want to take it? If you follow this line of thought you can end with a 6 pound AR that has 12 pounds in scopes on it, with a primary optics, secondary optic, tertiary optics, etc.

This is a topic I am going to develop a little further in the next Guns Of The Dark Lord video (I did not forget about it), but this attempt to get a little extra redundancy without too much weight is one of the reasons I am increasingly using Crimson Trace's weapon lights that are also combined with lasers. As a standalone weapon sight, a laser doe not do a whole lot for me, but it is a close range back up aiming method that I can get without a weigh penalty. More on that in the CMR-301 review.

This weigh consideration is also the reason I am looking so closely at the current generation of micro prismatic scopes. With compact 3x models from Primary Arms, Burris or Vortex I can have a 3x/1x set up with an offset RDS that is 10 ounces altogether with mounts.

With Vortex's 5x Gen2 Spitfire and piggy-backed RDS, I have 5x and 1x at my disposal with total weight of ~12 ounces.

Am I being paranoid? I am not exactly going to war here, so probably yes, but that does not mean I am wrong.

The way I look at this, the primary sight, be it a prismatic, LPVO, MPVO or fixed power scope varies depending on the specific rifle and what it will be used for. However, the back up sighting set up can (I hope) be more or less the same across the board and what I am stumbling around trying to converge on what exact configurations is optimal for me.

What do you think, gentlemen?

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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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