Followup on my AR-Comp load data question

[SlimMan]

This thread follows up on a previous post question. I hope someone will find it of some value since there really isn't much load data for AR-Comp floating around.

Using Hornady start and max data for 55 gr bullets (BT), I worked up 4 powder charges of AR-Comp to test with mixed brass and CCI SR primers. (FWIW, Alliant lists higher start and max loads than Hornady.) My rifle is a 16" barrel Colt. Off the bench, my most accurate load at 100 yds. was 22.6 gr (actually 0.1 below Hornady's recommended start load) and second most accurate was 24.5 gr (0.3 below max). The two 'tween loads were far less accurate. Sorry, but I have no chrono for these loads. I'll work on these loads a little and move up to the 69 gr SMK next.

For those of you that are in a position of buying what is available, this Alliant powder may not be a bad option if you run across some. It looks like it might work fine for me.

[308sako]

AR Comp has been awesome for me with 55 Nosler BT's at 25.2 grains, in a 5.56 chamber. This is hot.

24.8 worked well for another shooter I know, and yet another has had great luck with 77 SMK's and this powder.

Good luck finding the nodes.

[markm]

and second most accurate was 24.5 gr (0.3 below max).

That's right where I like to be. Near or at max and getting good accuracy.

[WC 2-3]

I like. 69 SMKs with 22.7 and 77's with 22.

[308sako]

Thanks WC, I had thought it was a little more... will try 22/77's soon.

D out

[WC 2-3]

Book max for 77's is 22.1. Examining the brass and primer, you could go higher. 22 gets me 2530 fps from a 16" barrel.

[SlimMan]

Thanks WC 2-3. I'm still toying with 55 gr bullets, but will move on to my 69 SMKs and take a look at your preferred load.