Did a little load testing today with H110 subs and 1680.

[RDA]

12 grains 1680 240 leatherheads 1100 FPS . Quiet and full function. The least accurate of the bunch but I think my silencer might have loosened a bit.

They aren't accurate. I was seeing 1,100 FPS from 11.0 grains of 1680.

[njogi]

Rocky - what was the rough Temp - when on your last posted posts ?

[RockyRiver]

75 to 80 degrees.

Also I load just about everything to 2.22. Not because its the best measurement. It might be. I don't know. It's just that I'm trying to maintain consistency in loading.

[njogi]

Thanks rocky.

~2.22 for Amax poly tip works for me. The rest above (SMK -nosler - non poly tip) 190 -220 and 175 I am loading to ~1.12 AOL is working for me on the Ar's.

[rippr334]

Did a little more testing with the H110, 1680 and , 220's, 240's and AMAX 208's today.

7.5" Anderson 300 BLK barrel and whatever el cheapo buffer that came with the butt stock kit. SpecWar silencer. All rounds fired were 1 1/2" or less at 60 yards with 5X red dot scope.

11 grains 1680 220 HPBT . 1000 FPS +/- 20 FPS . Full function but not as quiet as the H110.

I forgot I was a member here. I had a friend wanting a BO and I had a 8.25" upper he wanted, so I sold it. It was Hardened Arms. Here are my results with the Leatherhead 220s (now Gallant 225s), SR primers, 2.06 OAL, 75F, form 1 suppressor.
10 873
10.2 881
10.4 894
10.6 911
10.8 937
11 952
11.2 994
11.4 1010
11.6 1028

Anyways, I turned around and bought a Palmetto 7.5" and it's hella loud. I've run some loads with 1680 (same parameters as before, except now 80F).

10.2 907
10.4 940
10.6 964
10.8 992
11 1019
11.2 1022
11.4 1027
11.6 1060

Anyone notice that 1680 is a bit louder than other powders?