View Full Version : "Quarter" Minute of Angle
“Quarter” Minute of Angle
Here’s a simple exercise that you can conduct to assess the consistency of the overall performance of your AR-15, ammunition, scope and zero. You will need to down-load the 100-yard target (in .pdf format) that is pictured below, from the link at the end of this article.
https://app.box.com/shared/static/xwn2opb1s8t3rp9hxo4sem7qb2dsu2y9.jpg
As you can see in the pic above, the target consists of the images of ten U.S. quarters in a row, on an 8.5” x 11” piece of paper. The nominal diameter of a U.S. quarter is 0.955”; in other words, it is a sub-minute of angle target at a distance of 100 yards.
Post the target at a distance of 100 yards from your shooting point. Shooting from any position that you choose, with or without any support that you want, fire one shot and one shot only, at each of the ten “quarters” on the target. In order to score a “hit” on an individual quarter, the center of your bullet-impact must break the outline of the quarter.
The quarters should be shot at in consecutive order (left to right or right to left) in order to more easily keep track of any “collateral damage” (hitting one quarter when you were actually aiming at another.) Take as much time as you like in-between each shot, but at the end of the exercise you can only have ten bullet holes on the target.
As an example, the target pictured below was shot from the bench using one of my Krieger barreled AR-15s with match-grade hand-loads.
https://app.box.com/shared/static/3zi4kw2n5qokx2fbiqvtm530u9katm0a.jpg
Is the performance of your AR-15, ammunition, scope and zero consistent enough to make a single shot on a sub-minute of angle target 100% of the time; ten out of ten attempts? 90% of the time; 9 out of 10 attempts? 50% of the time; 5 out of 10 attempts? Down-load the target and find out!
Link to target, in .pdf format:
https://app.box.com/shared/static/twlxs1twkc.pdf
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Cotton68spc
7 July 2015, 16:39
I'm going to try it
Check me out on YouTube and Facebook
alamo5000
7 July 2015, 16:45
No sweat :)
It will fun to give it a go though.
WHSmithIV
7 July 2015, 18:15
I'll have to print this and take it to my friends ranch where he has a range set up with bench rest and try this. Was just up there a couple weeks ago and got my red dot optic sighted in perfectly too including using the 3x magnifier. Once we had it all zeroed we did a 5 shot group and he wanted me to have all the shots fit inside a nickel. Well, they didn't. They did fit inside something between a quarter and half dollar though. The Vortex Strikefire II is a 3 MOA red dot so that's about as good as it will get I suspect at 100 yards. What I should do is do this exercise with the iron sights. I know I can do it with my .303 Lee Enfield.
voodoo_man
7 July 2015, 20:03
Good stuff, excellent post.
WHSmithIV
7 July 2015, 20:08
I have saved the target. I will call Richard tomorrow and set up a day when he has some free time. I'm going to do this. I'll print a few of them and then, I'll post the results.
mustangfreek
8 July 2015, 02:13
Cool. Will do later on..
Too busy to try it anytime soon, but got some newer cooked up loads i want to try out.
Former11B
8 July 2015, 08:04
Would be fun to make it a timed drill. 5-10 seconds per shot or something...shoot under stress to determine results in less than ideal circumstances
I really like the idea behind this. I'm going to share it with some folks...thanks
Would be fun as a challenge for WEVO.
Gonna give 'er a shot.
Post pics of your results!
I have saved the target. I will call Richard tomorrow and set up a day when he has some free time. I'm going to do this. I'll print a few of them and then, I'll post the results.
Any results to report?
Jerry R
19 July 2015, 07:33
Really cool idea ! I've downloaded and will also forward to friends as a challenge.
Battle Cock
26 July 2015, 14:18
Does this count as results?
Shot with a Rainier Arms Ultramatch .223 Wylde at 100yd. It groups around 0.4 in at that range with match ammo.
http://i212.photobucket.com/albums/cc43/lobacha/Stippling/IMG_5329_zpsinz1bs1o.jpg~original (http://s212.photobucket.com/user/lobacha/media/Stippling/IMG_5329_zpsinz1bs1o.jpg.html)
alamo5000
26 July 2015, 14:24
Does this count as results?
Shot with a Rainier Arms Ultramatch .223 Wylde at 100yd. It groups around 0.4 in at that range with match ammo.
http://i212.photobucket.com/albums/cc43/lobacha/Stippling/IMG_5329_zpsinz1bs1o.jpg~original (http://s212.photobucket.com/user/lobacha/media/Stippling/IMG_5329_zpsinz1bs1o.jpg.html)
NICE. What optic and ammo/reload combo do you use to get .4" groups?
UWone77
26 July 2015, 14:29
BC,
Was this the upper you were dropping a bunch of coin on? If so, I remember the quality components!
Battle Cock
26 July 2015, 14:33
NICE. What optic and ammo/reload combo do you use to get .4" groups?
I have a Nikon Monarch 6-24x50 fine crosshair with dot in a ADM QD mount on top and I'm able to achieve those groups consistently with the only match ammo I've been able to get my hands on locally, Winchester .223 69gr Matchking HPBT.
I haven't dabbled in reloading yet but I have a feeling that when I do, I'll be stacking hits at the same distance.
Battle Cock
26 July 2015, 14:33
BC,
Was this the upper you were dropping a bunch of coin on? If so, I remember the quality components!
Yep! And I've been nothing but impressed with the quality.
alamo5000
26 July 2015, 14:47
I have a Nikon Monarch 6-24x50 fine crosshair with dot in a ADM QD mount on top and I'm able to achieve those groups consistently with the only match ammo I've been able to get my hands on locally, Winchester .223 69gr Matchking HPBT.
I haven't dabbled in reloading yet but I have a feeling that when I do, I'll be stacking hits at the same distance.
You better believe it. On the reloading thing the price goes WAY down when you reload. I am able to reload 69gr SMK and get better results than the Winchester ammo for right about .33 cents a round.
When I got my rifle I tested a mix of different store bought ammo... I got a bunch of different kinds of 55, some 60, some 62, some 64, some 68, and some 69s. The rifle liked the 69s a lot. At that point I had a shooting test between winchester and federal match... with the slight edge to Winchester. After I got that established I took about a month (considering really bad weather) and developed a load of 24.3 grains of varget with 69 gr SMK... it's been doing really good for me.
I shot a 10 shot group that was about dime size @ 100 yards and I was also able to take it out to 700 yards and plink on an 18" steel plate. For a relatively small time investment that for me is a tradeoff between watching tv or reloading, I can save quite a bit by reloading.
alamo5000
26 July 2015, 14:50
Yep! And I've been nothing but impressed with the quality.
What's your barrel length? I have been nothing but impressed with my RA barrel.
I have been somewhat intrigued by the ultra match barrels, so any report I can get... LOL...
Battle Cock
26 July 2015, 15:18
What's your barrel length? I have been nothing but impressed with my RA barrel.
I have been somewhat intrigued by the ultra match barrels, so any report I can get... LOL...
It's an 18" Ultramatch barrel with a Rainier Arms compensator. I may do a write up on the build if I find the time for it in the near future.
Does this count as results?
Shot with a Rainier Arms Ultramatch .223 Wylde at 100yd. It groups around 0.4 in at that range with match ammo.
http://i212.photobucket.com/albums/cc43/lobacha/Stippling/IMG_5329_zpsinz1bs1o.jpg~original (http://s212.photobucket.com/user/lobacha/media/Stippling/IMG_5329_zpsinz1bs1o.jpg.html)
Sure it counts, and thank goodness it wasn't a silver quarter. That would be wasteful.
Sure it counts . .
No, it doesn't. The whole point of the exercise is assessing consistency. A single shot does not consistency make.
....
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