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The 10-shot group thread (or other 10-shot or greater accuracy or precision shooting assessments) Login/Join 
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I am going to re-engage in the near future.

I very much appreciate the likes of fritz, jljones, and sigfreund; y'all have prompted me to better myself, by getting out of my comfort zone, and exploring new training approaches.
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
Freethinker
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A 10-round group today, JP Enterprises JP-15 rifle, 3-15×50 mm scope, heavy bench rest and rear bag, 100 yards, Federal Premium 73 grain Berger ammunition: 0.677" center to center; ~0.65 MOA. First time firing that ammunition I had never tried before.





I was really tempted to stop after the first five rounds for a nice “refrigerator” group, but I’d decided before starting the session that the first group would be ten rounds, and ten rounds it was.
The two at the top of the group and possibly the lower right impact were during the second five rounds of the group. Again, evidence that 10-round groups aren’t the same as five-shot or groups with even fewer shots.




6.4/93.6
 
Posts: 47519 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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What was your POA; the circle or diamond? Either way: your precision is lacking! I kid; I kid. Awesome shooting. Thank you for your continued contributions.
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
Freethinker
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With those targets that I usually use for shooting groups and establishing zeroes, I normally aim at the center of the diamond. The overall diamond shape allows good centering with conventional crosshairs, and the small center open circle allows good placement of reticles with central dots. The scope on that rifle has a 15× max magnification and no central dot in the reticle so I mostly concentrate on aligning the crosshairs with the corners of the two diamonds.

Despite the snide ( Wink ) comments we get about not hitting what we’re aiming at, when testing ammunition for precision, as I was with that session, I don’t attempt to move the point of impact to the point of aim because the sight is zeroed for a different load. Plus, many of my inputs to the ballistic solvers in my Kestrel or computer use “offsets” for the zero information. For that group, I’d enter that the load was zeroed at 100 yards, but with an approximate +0.6 inch offset above the point of aim.

Also, the designer of those targets actually intended for the groups to hit the open circle above the diamond aiming aid. His rationale for that is as the point of aim gets chewed up, that can lead to aiming errors after a few shots. When I watch videos of people shooting small groups at various targets, I often wonder how they can get a consistent POA when the central aiming point disappears.

This message has been edited. Last edited by: sigfreund,




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Posts: 47519 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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I have brainstormed a 10rd accuracy and precision drill for myself. I will employ 2MOA dots as aiming points (2" at 100, 5" at 250, etc). I will shoot one shot per target, starting at 100M; from 100M I'll move to 150, then 200, 250, and 300. I will have two targets to engage at 300. From there I'll move back to 100 in the same fashion, making for a total of ten targets with one shot each. I'll leave the timer at the 100M position, so it can beep me to start, and register the last shot; I guess I am going to be running. Roll Eyes
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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Interest challenge -- running before/between shots makes it more difficult to stabilize the sights, mainly from breathing issues.

Depending on your shooting position, a 2 MOA dot drill might be reasonable. However, I don't consider a 2 MOA dot "precision", assuming you're using magnified optics. In times where even value-line AR15 builds from the likes of Palmetto State Armory can exhibit close to 1 MOA accuracy, 2 MOA targets are more along the lines of AK47 and older Mini-14 capabilities.

Rifles Only courses use a progression of accuracy demands for dot drills, as one moves to more and more advanced courses. The concept is to develop competency at a given skill level before moving on to increasing challenges.
- Start with 1 MOA dots from stable prone, first at 100 yards, then progressing to 200 & 300 yards.
- 2 MOA dots from barriers, first at 100 yards. Progress to 1 MOA dots at 100 yards, then on to 1 MOA dots at longer distances.
- 1 MOA dots after movement/running, from prone.
- 1 MOA dots after movement/running, from barriers.

RO's concepts coincide with my experience in steel/precision/PRS matches, where the fundamentals of marksmanship are best learned in less complex drills. I'm not saying your 2 MOA dots aren't valid drills, but they are more geared to testing aerobic fitness than precision shooting in this proposed case.
 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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Ahhhhh; some of the good ol' fritzy motivation, wherein he makes me feel like a totally incompetent hack. Is it true that a PSA AR is capable of 1MOA? In my researching off-the-shelf barrel makers, it seemed that true 1MOA was not necessarily common; I ended up with Noveske, and something at a similar price point and availability (Criterion) evaluates the same, in terms of accuracy. Both are capable of producing 10rd 1MOA groups under ideal conditions; i.e. benched, fancy trigger, tuned handloads, controlled environment, at least 25x glass etc. To think that I would be able to achieve even similar results in the prone in a pasture with a Harris bipod and squeeze bag, GI trigger, quality factory ammo, and 14x magnification seems a lot to ask. The best 10rd group I've produced with the gun was 1.640"; typical 10rd groups are 2MOA, which prompted the selection of 2MOA targets. Is my precision the same as super badass precision? No. My "precision" is in the context of a general-purpose medium range carbine and it's handler being able to put a bullet pretty-well right where they want it, out to 300M. If I can perform this drill without a miss, I'll be psyched. I didn't make it for fitness, but it doesn't hurt my feelings that it has that additional practical aspect. If someone with an AK or Mini-14 built with off-the-shelf parts, and with the same other weapon and circumstantial limitations, can outperform me and my setup, then I'll take it on the chin, and keep practicing. Wasn't much of this thread born of the idea that many folks' accuracy claims are trumped-up? But now we're talking about a $400 PSA AR shooting 1MOA? What am I missing?
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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A free-floated AR15, with a reasonable barrel and quality ammo is capable of respectable accuracy.

The ammo must suit the barrel, and this means not all factory loads or hand loads will show great results. But FGMM 69, FGMM 77, Hornady 75 HPBT match, and Hornady 55 Vmax are among the most accurate factory loads out there.

55 grain FMJ won't produce great accuracy on a consistent basis, regardless of ammo manufacturer or rifle build or barrel. Expect 3-ish MOA results. Maybe 4 MOA. Some groups under 2 MOA.

Your Noveske barrel should produce great accuracy with the right ammo. Almost certainly better than 1 MOA, with possible "refrigerator trophy groups" of 1/2 to 3/4 MOA when the stars align. You may not have found the ammo it likes. Every barrel is different. But as my AR15 mentors have stated -- if a barrel with adequate twist doesn't shoot FGMM 69 or 55 Vmax well, there's a problem.

ARs are easy to shoot -- great ergonomics for most of us, limited recoil, reliable cycling. ARs are not the easiest thing to shoot accurately on a consistent basis -- some moving parts with a fair amount of mass, and vibrations from gas. It took me years to develop the skills to shoot an AR fairly accurately. But it's a perishable skill, and I'm constantly trying to attain the skill levels of my instructors.
 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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I was wrong. The evaluation I referenced shows sub-MOA performance.
https://www.ar15.com/forums/ar...pilation/118-772948/
I, of course, concede that, if my fundamentals are on point, many of my circumstantial excuses shouldn't have an impact. The ammo is the only thing that's arguably outside my control. I have been using 73gr FTX; it shot the best, when I was comparing ammunition initially (better than GMM), and I am pleased that the barrel likes a heavier "performance" bullet, that theoretically has better terminal performance at lower velocities. However, I also concede that my initial accuracy evaluations were conducted in what could be considered the "break-in" period, and accuracy results could be different now, if I was to revisit some different loads. When you say "adequate twist", is there a spin factor that could be hindering my performance, considering the short length of the barrel (10.5")?
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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I have 2 competition buddies who shoot either 11" or 11.5" barrel AR15s. Twists are in the 1:7.5 to 1:8 range, barrels are high quality blanks from White Oak or Compass Lake. Optics are 10x maximum IIRC. Handloads use SMK 77 or similar, loaded fairly hot -- approaching "normal" MVs for barrels of around 13". They regularly shoot sub-MOA out to 400-ish yards, sometimes producing sub-3/4 MOA results. At 100 yards they are pretty close to 1/2 MOA rifles. Their short-ish barrels seem to stabilize heavy bullets just fine.

I vaguely recall that your 10.5" barrel has 1:7 twist, which should fine. I suspect your 73 grain bullet is shorter than a SMK 77, meaning that it should be easier to stabilize.

As for accuracy testing, I find that quality barrels shoot well from almost the beginning. Almost...meaning that I often discount accuracy for the initial 5 to 10 rounds that I use to smooth out the barrel's throat (i.e. "break in"), and to confirm zero. I see greater accuracy issues when switching among ammo types.

Here's an example, which I've likely used somewhere before on SF. A 14.5" Wilson Combat fluted recon barrel, 1:8 twist. Second day of use, less than 100 rounds on the barrel at the end of the second day. 2-10x optic. Either 430 or 440 yards, winds varying constantly 3-12 mph from my 1-2 o'clock. Likely holding just inside the right edge of the plate to a few inches off the right edge of the plate. Aimed level with the angled point of the hip or shoulder of the full sized IPSC. I had just shot 20-30 rounds of Federal Vmax 53, which this barrel wasn't overly thrilled with. Next up is Hornady 75 Black BTHP. The first 5 rounds are the higher group. Shot #1 was way low, #2 was a little higher, #3 through #5 stacked on top of each other. About 1" vertical variation for #3-#5. Total group vertical of 5.5".

Second group is the lower one. 5 rounds pretty much stacked on top of each other, with 1.5" vertical variation. I got lucky with wind holds. Pretty close to 1/3 MOA at roughly a quarter mile.

 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
Freethinker
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Another offering:





Ten shots with Tikka T3x TAC A1 chambered for 308 Winchester, ammunition Hornady 155 grain A-MAX TAP Precision, 100 yards, prone supported by bipod and rear wedge bag.

The “flyer” was the obligatory “I’ve got this” number eight shot of the group. Including that the 10-shot total measured 1.059 inch center to center, or about 1.01 MOA. Discounting that one the group measured 0.789" CTC, ~0.75 MOA.

As an excuse/disclaimer to shift blame from the rifle and ammunition, I was shooting to confirm the zero rather than concentrating on pure precision and after I could see where the first shots were hitting, I lost a little focus. That’s my story and I’m sticking to it. Wink




6.4/93.6
 
Posts: 47519 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Well done!
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
Freethinker
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A couple of more examples.

Targets 2 and 3 were fired with a Winchester model 52E and Lapua Center-X 22 Long Rifle ammunition at 40 yards*. Target 2 was five shots, and 3 was 10 shots.

Targets 5 and 6 were fired with a Ruger 77/22 and Lilja barrel and SK Standard Plus ammunition at 37 yards*. In the same order target 5 was five shots and 6 was 10 shots.

All shots were fired using a bipod and rear bag for support on a sturdy bench.

Once again evidence that it's difficult to hold 10 shots to the same group size as five shots. But 10 shots give a better idea of where the zero actually is.




Shooting conditions were somewhat poor with a constantly varying 6 - 15+ mph wind from about 11:30.

* The shorter distances were part of a examination of the value of shorter zero.




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Posts: 47519 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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I did some shooting today, that I previously outlined in a thread in the rifle room. I am still on the struggle bus, but I hope to, by eliminating a couple variables, get a better idea of what me and my gun are capable of.

A couple notes from today's session: I was feeling more hindered by the GI trigger than I normally do; I was also struggling with mirage more than I have before.

All target dots are ~1MOA, relative to the distance to the target. Same 10.5" Noveske shooting 73gr FTX, using a Leupold VX3HD on 14x, Harris bipod, and rear squeeze bag, from the prone. I removed the rear bag and rolled back onto my haunches between every shot.

The first ten shots were from 100M. I used the top five targets to get an impression of the state of my zero. After moving to the target and marking them, I made an adjustment of 1MOA up. The adjustment seemed appropriate, based on the impacts on the bottom row. I thought it was interesting that both rows followed the same waveform. The overall spread of that bottom row was right at 2MOA, which has been typical for me and this rifle.

https://photos.app.goo.gl/eabkByon3YWsk7Lf9

The next ten shots were from 200 and 300 meters. The first of five shots from 200M is the one on the very edge of the cardboard. I used my DOPE of 2MOA, which seemed inappropriate. I revised my DOPE to 4MOA, and I'll revisit it later. Aside from the very poor first shot, the spread on the 200M shots was good.

Based on my experience the other day, my adjustment made toady, and the desire to ensure shots landed on the cardboard, I did not use my 9MOA DOPE, and dialed 10 instead. That seemed appropriate, and the dispersion of shots 2-5 on the 300M bottom row is quite acceptable to me; but that first shot obviously can't be ignored.

https://photos.app.goo.gl/rhXJBCzCSHLrkM4L9

Any feedback from my betters is encouraged!

Even when they're all "first shots", my first shot still sucks! Why?

My LGS ordered a couple Wilson H2 TTU triggers, which is the one I have been considering, and I may finally get one.
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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OK, you have a good baseline for those distances, breaking position between shots.

I recommend repeating this process -- same target distances and same elevation on the scope. But this time, do not break position between shots. Just get into a comfy rhythm of shots for each string.
 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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Thank you for the reply, fritz. Please consider my recent post in the rifle room, concerning POI shifts from some shooting I did today. Sorry to have two threads going.
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
Freethinker
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Five versus 10+ (lost track) shot groups.





Tikka T3x TAC A1, 6.5 Creedmoor, Hornady ELD Match, 147 grain left, 140 grain right. Bench rest at 106 yards. The five-shot group was less than 0.5 inch, and the 10+ group measured about 0.9 inch center to center. The second group was obviously not nearly as good, and although it still met Tikka’s precision guarantee, it was another example of how the number of shots in a group can significantly affect its size.




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Posts: 47519 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Maybe 4-5 years ago, I wanted to compare & contrast shooting for groups vs. dot drills. I was warmed up, knew the concepts of what I wanted to show, shot at 50 yards with a Kimber 22lr bolt action. I tried to show similar shooting fundamental errors -- dot drills on top, groups below.



#1 -- Often what occurs when the shooter doesn't get behind the rifle consistently. Could be having your eye not centered in the scope. Or inconsistent cheek weld.

#2 -- Lateral dispersion. Often from inconsistent trigger press, which can occur from not contacting the trigger with the same part of the finger each time.

#3 -- Vertical dispersion. Often from breathing issues. Also could be issues with rear bag or cheek weld.

#4 -- Rounds falling all over the place. Most likely the gun and ammo are pretty accurate, and the optics are sighted in properly. This is where the shooter needs schooling on all the fundamentals.

******

I was teaching a couple of relatively new shooters around the time of this target. One asked how I was able to switch between types of errors on one target page. I replied that I could have center punched each target if I wanted to. Instead, I aimed for specific types of misses, to better illustrate the effects of various techniques. His dad just smiled.
 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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Nice shooting, sigfreund and fritz.

Did I read your post correctly, fritz? I understood that you deliberately placed the shots, to create the intended pattern. At first I thought that you deliberately created a defect in your fundamentals, which resulted in the intended outcomes; that would have been pretty wild.


I don't have any 10+ groups to report, though I did experience a good example of low-round-count BS. I was confirming POI at 300m, and shot three rounds in a four inch spread. 1MOA at that range is about 3.5". This was through a $150 barrel, shooting 62gr Frontier, using a 14X Leupold, off a bipod and bag. It was quite breezy to boot.
 
Posts: 2353 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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quote:
Originally posted by KSGM:
Did I read your post correctly, fritz? I understood that you deliberately placed the shots, to create the intended pattern.

Yeah, I deliberately placed the impacts to mimic poor technique. Just needed a plan prior to pulling the trigger. The biggest challenge I had was a variable breezes from the right. Lateral wind drift varied between .5 to 1.5 bullet-hole-width over the course of shooting this target. That's the primary reason the upper dot drill targets don't exactly match the lower group targets.

Honestly, if a person can repeatedly punch the center of a target, placing shoots at various non-center points in a target isn't that big of a leap. This kind of technique is constantly used in steel matches, where holding off-target or edge-of-target is the norm.
 
Posts: 7943 | Location: Colorado | Registered: January 26, 2008Reply With QuoteReport This Post
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