DarkLordOfOptics
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Magnification and slings

Here is an interesting question I received on one of the forums:
"I searched the forum for answers to no avail.
I am not a PRS shooter.
In my context, I prefer to shoot standing, kneeling, sitting, and prone using sling-supported positions i.e. no bipods or tripods etc.
Taking my context into account, I am wondering if you would have any thoughts on what the maximum magnification a scope could have, while being employed from sling-supported shooting positions, without being so powerful as to make shooting impossible due to image wobble?
For example, I am confident I could use a 9x from a sling-supported standing position, but a 12x or higher I do not know.
Does my question make sense?"

This is a little bit out of the left field since comparatively few people these days shoot with support slings. It so happens that I do, but I have to admit that most of the time I shoot with a support sling uses something that is more similar to a Ching sling than to a traditional loop sling. I do have one proper 1903 sling, but it is attached to a rifle that has dual aperture iron sights on it. That particular one is a biothane sling from Turners. It is a pretty respectable shooting sling and an even better tourniquet.

Most of the sling I use come from Mr Rifleslinger: https://rifle-craft.com/

I believe these to be the best general purpose two point slings on the market today and of the four models he has produced over the years I have at least a couple of each.

The gentleman behind this company is the same guy who wrote what is likely one of the most extensive series of articles on shooting with a sling, practical shooting accuracy, shooting quickly with a boltgun and a bunch of other things. He stopped updating his blog, but for now it is still up and it is a very worthwhile read: https://artoftherifle.com/

Now onto the question at hand: how much magnification can you use when shooting with a support sling? The answer, unsurprisingly, is a resounding "it depends".

The wobble you see in the sight picture really does not depend on the magnification. The magnification makes it look a little different, but in terms of actual POA wobble, all things being equal, it will be exactly the same on any magnification. The natural question is then why not just put the scope on the highest magnification, then? Well, because all things are not equal. Not all shooters are equal. Not all guns are equal. Not all scopes are equal. Not all shooting positions are equal.

There is a nasty trick that our bodies tend to play on us when we are aiming: when we see a wobble in the sight picture, we start subconsciously trying to correct it which only increases the wobble zone. That is one of the primary reasons to to not go too high up in magnification. A lot of that can be trained for and some people (not me) are better at it than others. There is really no way to predict how exactly that will pan out for each individual shooter. Personally, I tend to use the lowest magnification that allows me to see the target clearly enough. Naturally, if you happen to be shooting at something comparatively small, a little more magnification will go a long way.
It so happens that I have done a lot of shooting with a support sling and a 3-15x50 scope (TT315M). The way it usually works out for me is that 15x is perfectly usable when shooting prone, but for everything else I am a little more accurate with less magnification. I can't suppress my brain's subconscious attempts to correct things well enough. Perhaps, I am not good enough at finding my NPA, but to be honest, I do shoot reasonably well with a sling. I have had a lot of practice.
Fair disclaimer: with a sling I mostly shoot prone, sitting and a few version of kneeling. A lot of people seem to like the squatting position, but I am a bit too old and fat for that one. When shooting standing, the sling might provide some psychological help, but I do not think it actually stabilizes anything. I have tried it a few times and I actually shoot worse if I try to use the sling while standing. I do tend to drive the gun while shooting standing rather than try to settle into a wobble zone. It seems to work a little better for me.
Another factor to consider is that your eye position with respect to the scope is going to be a little different in different shooting positions. In practical terms, that means I will set the scope up so that it is perfectly located for shooting slung and prone. When transitioning to other shooting position, there usually isn't enough eyebox to use the same high magnification without weirdly contorting my neck even if I wanted to. In order to keep my neck relatively unstressed, I HAVE to drop the magnification a bit.
It does vary from person to person, so the only way to really figure this out is to experiment. I have done exactly that. When prone, I seem to end up around 12x most of the time whether shooting slung or off a bipod. When shooting offhand, I shoot best with the scope around 3x. Sitting position is somewhere in between and it sorta depends on how forgiving the eyepiece of the scope is.

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Blast From The Past: Millett ZoomDot RDS

I dug this thing up purely by accident. It has been a long time since I used it for anything, but I am thinking I should, especially as I work on a magnifier video.

MIllet's ZoomDot was a unique red dot sight that had auto brightness and variable dot size from 1MOA to 10MOA.

Early ones, like mine, were made in the US. Millett had some aspirations of selling these to the US military.

I do not think they got very far, then the company was bought by Bushnell and essentially shut down after a little bit. At some point, the manufacturing for the ZoomDot moved to China and it was not really the same.

00:05:44
Scout Scopes: Burris 2.75x20

Scout scopes are almost like a forgotten art form these days. There is an occasional discussion either on how they are the greatest thing since sliced bread because 1) THE colonel said so 2) if you do not think they are, refer to rule number 1.
Alternatively, the prevailing thought is that they are completely useless and if LPVOs existed in Jeff Cooper's time, there would never be such a thing as scout scopes.
The truth, as is usually the case, resides somewhere in the middle.
Scout scopes do have their place, but they are definitely a niche product. It is, however, an interesting niche.
Scout scope pickings are relatively slim in terms of what's on offer.
Leupold makes a 1.5-4x28 https://alnk.to/gKSibYj
Burris makes a 2-7x32 and 2.75x20
Vortex has a 2-7x32 in the Crossfire line
There are also a few out there from UTG, Aimsports, etc.

I strongly lean toward compact fixed power designs, so Burris 2.75x20 https://alnk.to/cSJCBQx is probably my favourite and is the subject of this ...

00:11:58
Integrix M1 MRAD Reticle in the 3-18x44

Wind was really making things difficult, but at least this gives you a look at the reticle.
It is a respectable design that is conceptually closer to SKMR reticles than to the ones I usually gravitate to. They also have an M2 that is, I think, a little better.
In the grand scheme of things, the M1 did not take me long to get used to and it is not giving me any real issues.
https://alnk.to/9TaI2kH

00:06:33
Integrix 3-18x44 Tracking Follow-up

I reached out to Leapers to relay the issues I found with reticle sizing and tracking in the 3-18x44 scope they sent me.

They confirmed that the scope I have here is an engineering model. They also talked to engineering and, apparently, they found the same issues I did with the mrad model and fixed them for the production run.

The MOA model (https://alnk.to/eZIJo9a) is, according to them, spot on. The issues were only present in pre-production mrad scopes.

Once they get production scopes going, I plan to re-visit them. I think the first one to become available will be the 4.5-27x model with the M2 Mrad reticle. I saw it during SHOT and I think it will be more up my alley than the M1, though the latter is still serviceable.

This is strange but once in my lifetime I felt fortunate to be not smart enogh to be in Harvard University...

Memorial Day Sales

I am beginning to see some early Memorial Day Sale emails in my inbox.
If I see anything interesting, I'll add it to this post which will be pinned to the top, rather than inundate you with incessant "it's a sale!" emails. Better keep it all in one spot.

The first one I see is from Opticsplanet. https://alnk.to/cwU58u8
They have all sorts of stuff rom Burris and Steiner discounted including the recently introduced Burris XTR PS 5.5-30x56 for $2199 https://alnk.to/d3Em4Su and the rather unusual Steiner T6Xi 3-18x56 https://alnk.to/ge7ZJBN
Eliminator 6 gets you $400 of bonus bucks to use on something else. https://alnk.to/flycPy8

Tract Optics will be running a 10% storewide sale starting Thursday with the discount code "REMEMBRANCE". While I generally like their products, the one that is really agreeing with me the most is the new 2.5-15x44 with MRAD Eagleman reticle. https://tractoptics.com/toric-uhd-30mm-2-5-15x44-ffp-illuminated-mrad-eagleman-long-range-hunting-rifle-scope/
I am sure ...

First PRS Match is behind me
High Noon at Del Norte

My first PRS match is officially behind me.  It was, I think an officially sanctioned regional PRS match at the shooting range called Del Norte about an hour from me (just east of Rio Rancho).
As I discussed previously, rather than using the rifle I originally prepared for it, I ended up having to change gears at the last moment and slapping a 5-25x56 Tangent on my daughter's 6ARC MiniFIx.  A lightweight 16" Proof barreled 6ARC is not an ideal set up for PRS competition, but, in the grand scheme of things, the rifle did hot hold me back at all.  I had a couple of weights that fit the Q-cert handguard, so I slapped them on there as well, which got the rifle to right around 12lbs.  The balance point was almost where I want it, but not quite.  In all other ways, this was a very handy rifle to shoot.  I am actually thinking of getting a couple more weights that I can stack on it (Sawtooth weights are stackable), so that I can shoot some future local matches with it.  It shoots Hornady's Black 105gr ammo very well (it also shoots 108gr ELD-M and 103gr ELD-X well, but I had a larger supply of Hornady Black ammo on hand).

It chrono'ed pretty consistently for factory ammo.  Here are the measurements for a 20 shot group.

If I were to take out the fastest shot, SD drops down to 8fps.  

In terms of wind performance, it is a 5mph rifle, so slightly better than the 308 ammo I was going to use originally, but not as good as the 6.5CM that was my intended match rifle for this year (we make plans, but then life happens).

I do have to admit that I really enjoyed shooting the match with the MiniFix.  So much so, that I am seriously thinking of building another one for myself, since this rifle is technically my daughter's.

The closest shot we had was a bit over a couple of hundred yards.  The furthest was around 1150.  That was a bit challenging for the 16" barreled 6ARC, especially since the terrain there is tricky and wind is doing strange things.  Morning was relatively quiet wind-wise, but then the wind becamse gusty with changing directions.

It was a one day match with about 30 shooters (six squads) and ten stages.  The 17 year old kid who won the match was in my squad with his dad.  Apparently he is on the US team, so it should not be surrpising that he won.  He was very good.

Overall level of the shooters in the match was quite good.  I really was not sure what to expect.  Somewhat paradoxically, the only matches that I have shot in so far are the much larger two day NRL Hunter matches.  In those, I am just out of the bottom third in terms of skill level.  In this match, it was pretty much in the same spot, I think.  

The terrain was a little bit like Cameo, I think (I have been there, but not shot there), with some angle changes and sufficient vegetation to make getting on target occasionally troublesome. 

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Getting back on the horse, little by little

My original plan was to do a livestream on Thursday of this week, but I think I'll push it out to next week.  A few days at home is doing wonders for my recovery, but my voice is still not quite there.  I do not think any of you are looking to listen to me cough for two hours straight.

Also, I am going to try to shoot that local PRS match this coming Saturday, so doign a livestream next week after the match is likely to be more productive.  It is my first one, so I fully expect that I will screw it all up.  It should be a good learning experience.  I do not have a dedicated PRS rifle and I am not looking to set one up jsut yet.  If I like it, I'll put something together, but as far as competition goes, my focus is really on UKD matches like NRL Hunter, Competition Dynamics, etc.  My 6.5CM is not back yet, so I'll just shoot it with my 308 FIx.  It is not ideal, but it will do just fine for my purposes.  I am in no danger of winning anything either way and this will stress my ability to read wind.  A secondary purpse here is that I am not 100% certain what rifle I will take on a mule deer hunt with later this year, but it will be either something new to test or this 308.  Now that I think about it, the 308 is going with me regardless either as a primary rifle or as backup.  The rifle shoots, so if I miss, I know it is on me.

For the match, I have Burris XTR PS 5.5-30x56 scope on the 308 Fix.  I think the way they did the heads up display in these is a meaningful improvement over conventional riflescopes.

https://alnk.to/d3EjPHC or https://alnk.to/8iVRlGN

Optically, I think XTR Pro is a little better, but the EO integration in the XTR PS is, I think, in advantage.

In parallel, I am looking at the replacement AAC ammo (they replaced the faulty ammo and I have chrono results on it) and testing the optics of the 40mm scopes in parallel.

 

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A first look at Steiner H6Xi 2-12x42
MPVOs are finally getting some attention

Here are some initial thoughts on the Steiner H6Xi 2-12x42.

I finally had a chance to shoot with it both supported and unsupported, which is an important part of figuring out how usable an optic is.

I found what looks to be more accurate specifications in the manual that came with the H6Xi, so the spec table is now updated:

To re-iterate from an earlier post, Eurooptic is selling the H6Xi 2-12x42 for $1350 and at that price, it is easily the best deal going in this category: https://alnk.to/90ALO3C

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