Another update on the 11.5 Armalite. I went to a 100 yard range today with more GGG M193 and some AAC 77gr OTM and a chronograph.
Unfortunately, I didnt think about putting a bigger scope on it, so all shooting was done with the TA11 I had on top of it.
I thought the chrono numbers looked pretty good. I used 10 shot strings.
M193 - 2763 vel. 16.5 SD 59.9 ES
AAC 77gr - 2282 vel. 17.7 SD 43.3 ES
Neither of the types of ammo I used were match grade by any means, but they were pretty consistent.
Groups with the M193 ran in the 2 to 2.5 MOA range. At least I know from yesterday that it shoots well enough to put hits on reduced size IPSC targets at 400.
The AAC 77gr shot into the MOAish range. MOA give or take. This is the same result that I get out of my 16" Criterion Hybrid barrel, so Im happy with that. I just wish I got a bit more velocity out of it. I think this lot of AAC was underpowered.
I was running the gas block with the .066 gas port and the AAC failed to lock back on the last round. I put the block with the .070 port back on when I got home, just to be sure.