Colt AR-15 Accuracy


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spriz
April 8, 2010, 03:31 PM
New on here, and thought I'd ask about some accuracy questions. I have a Colt AR-15 which looks very similiar to the A2 with a 20" bbl 1:7 twist. My goal was to create a precision tool, just for the simple fact that I enjoy the AR system and 223 rnd. Look at the pics from before and after. So I installed a free float tube, recoil eliminator, and now plan on reloading with 77 grain sierra hpbt matchking bullets (is moly coated better?), Alliant RE-15 24.1 grn, with remington 7-1/2 primers. Has anyone had any expierence with loading the 77 grn? How about replacing the two stage 8lb trigger? any thoughts appreciated.

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taliv
April 8, 2010, 03:35 PM
loading 77g is easy. (search the reloading forum for years of posts on that topic, and also the competition forum, since 77g is a fav of NRA HP shooters) R15 is a great powder, as is varget. replacing the trigger is also easy.

the main thing is the main thing. you need a good barrel. or you need to get real lucky with a factory barrel.

you can shoot 1/2MOA groups with an 8lb trigger, and sometimes you have to find a load that your barrel really likes, but no amount of tweaking the components will make a bad barrel shoot great

btw, welcome to THR!

TonyAngel
April 8, 2010, 05:44 PM
AR15s are capable of accuracy that will rival a good bolt gun. The main thing is, as mentioned, to first try a variety of loads to detemine if the barrel that you have is capable of giving you the accuracy that you desire. You should also be aware that changing the powder charge by a couple tenths of a grain, or less, can have big effects on accuracy, so go slow when working up a load.

If you do find that you'll need a new barrel, the sky is the limit. If you're on a budget, White Oak has some nice barrels as does Wilson.

If you are new to ARs, you should also take note that .223 is not the same as 5.56mm.

spriz
April 8, 2010, 07:07 PM
I'm not really concerned on my barrel, even though I understand the importance. Yes, it is a factory, but also a match hbar bull barrel. I agree, I think I will load 5 rounds of 21.5, 22.2, 23, 23.4, 23.7 and 24.1 and see what the weapon prefers....

what about moly coated bullets though?

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