Precision 223

[Jerry M]

View attachment 336436

Crappy cell phone pic. This is 10 shots @ 200yds. Shot the 5 on the right, made an adjustment, then the 5 on the left. AR match rifle w/ irons, prone w/ sling. For reference, the "X" ring is 1 7/8" diameter. AR's can be very accurate!

77gr. Sierra
23.5gr N140

Outstanding shooting there buddy!

 

[Growler215]

Anyone load for precision 223 ?

A friend is trying to test some theories and advice he's taken from SOTAR youtubes and other channels on making ARs accurate. Many people claim sub-MOA from ARs, but others claim 2 MOA is the norm. He's picked up several brands of factory match 223 ammo.

So I'm helping by trying to load precision 223 to the best of my current abilities and tools, to test again factory match.

What I have:
Rem 7-1/2 benchrest primers
Hornady 75gr match
Hornady 50,53,55,60gr V-max
Hornady once-fired brass
Norma once-fired brass
Benchmark Powder

I wet tumbled and swaged all the brass, then sorted by length. (Not very good at trimming brass atm). Projectiles are sorted by weight.

I'm trickling powder to the half-tenth of grain, and using same length brass for each projectile weigh.

Anything else I should consider, without buying tools, or is the task doomed without investment ?

We'll be testing about 6 different rifles, 2 different shooters, 10 different loads.

Instead of spending time measuring and sorting brass by length, I find it more convenient to sort by headstamp and just trim everything to the same length before the first use (or first re-use for "range brass" that didn't come from my gun). I use a Lee quick trim die and deluxe power quick trim cutter with an electric drill to get everything starting out the same length. This setup doesn't require any real skill to get consistent results.

So far my experience has been that brass that starts out the same length ends up about the same length after firing, so I shouldn't need to trim again for a while.

 

[85MikeTPI]

Instead of spending time measuring and sorting brass by length, I find it more convenient to sort by headstamp and just trim everything to the same length before the first use (or first re-use for "range brass" that didn't come from my gun). I use a Lee quick trim die and deluxe power quick trim cutter with an electric drill to get everything starting out the same length. This setup doesn't require any real skill to get consistent results.

So far my experience has been that brass that starts out the same length ends up about the same length after firing, so I shouldn't need to trim again for a while.

Thanks.. Yes that would normally be the case, but I (incorrectly in fact) thought I didn't have a 223 brass trimmer, which led to my OP statement:
"to the best of my current abilities and tools"

I later was looking for something else, and found a Worlds Finest Trimmer for 223 that I forgot I ordered..

 

[atblis]

SAAMI min for 223 is 1.730”. Point being, you can go shorter than the often published 1.750” trim length if trying to uniformly trim to a length. I settled on 1.745”

I’ve tested how much brass grows in length out of an AR. Some of my ARs, the brass settled in on a length after a single firing and then didn’t change at all. I reloaded some cases 12 times. Depends on your gun. Mid and rifle length gas systems don’t seem to stretch brass was my conclusion.

 

[rossiski]

I got a Lwrc varmint wylde that subs frontier 75 grains sub MOA all day. For factory ammo it’s very very accurate.


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[rossiski]

“Shoots”


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