Data as follows:
Ramshot TAC. CCI #41. AA Brass. 2.25 OAL. Fired over a CED M2 Chronograph ~15' from muzzle.
28.0g
2338
2475
2379
2412
2365
High: 2475
Low: 2338
E.S.: 137
Ave.: 2393
S.D.: 47
28.2g
2362
2345
2393
2358
2416
High: 2416
Low: 2345
E.S.: 71
Ave.: 2374
S.D.: 25.9
28.5g
2463
2438
2453
2440
2432
High: 2463
Low: 2436
E.S.: 27
Ave.: 2445
S.D.: 11.2
28.8g
2401
2427
2435
2401
2455
High: 2455
Low: 2401
E.S.: 54
Ave.: 2423
S.D.: 20.7
29.0g
2437
2458
2432
2466
2439
High: 2466
Low: 2432
E.S.: 34
Ave.: 2446
S.D.: 13.1
The brass from all the loads appeared essentially identical. No swipes, cratered primers, or any marks on the case head.
Unfortunately, I didn't really get to shoot for accuracy. My barrel nut had come loose at some point and I re-tightened it. I didn't think it was going to throw off point of aim as much as it did, so I only brought 20 rds to sight in. I fired all of them and never got on paper at 150 yds. This was out in the desert, with no assistance, so I couldn't really accurately tell where my rounds were even hitting. I should have at least bore sighted at home.
So, I just said oh well, and fired the new loads for chrono readings.
Most interesting to me is that 28.5 and 29.0 are nearly identical, except for the deviation. I think I'll be working in the 28.5 area for accuracy testing.
Ramshot TAC. CCI #41. AA Brass. 2.25 OAL. Fired over a CED M2 Chronograph ~15' from muzzle.
28.0g
2338
2475
2379
2412
2365
High: 2475
Low: 2338
E.S.: 137
Ave.: 2393
S.D.: 47
28.2g
2362
2345
2393
2358
2416
High: 2416
Low: 2345
E.S.: 71
Ave.: 2374
S.D.: 25.9
28.5g
2463
2438
2453
2440
2432
High: 2463
Low: 2436
E.S.: 27
Ave.: 2445
S.D.: 11.2
28.8g
2401
2427
2435
2401
2455
High: 2455
Low: 2401
E.S.: 54
Ave.: 2423
S.D.: 20.7
29.0g
2437
2458
2432
2466
2439
High: 2466
Low: 2432
E.S.: 34
Ave.: 2446
S.D.: 13.1
The brass from all the loads appeared essentially identical. No swipes, cratered primers, or any marks on the case head.
Unfortunately, I didn't really get to shoot for accuracy. My barrel nut had come loose at some point and I re-tightened it. I didn't think it was going to throw off point of aim as much as it did, so I only brought 20 rds to sight in. I fired all of them and never got on paper at 150 yds. This was out in the desert, with no assistance, so I couldn't really accurately tell where my rounds were even hitting. I should have at least bore sighted at home.

Most interesting to me is that 28.5 and 29.0 are nearly identical, except for the deviation. I think I'll be working in the 28.5 area for accuracy testing.
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