Berry's 220The actual design of bullet makes a difference. You will need to provide a manufacturer and style to get the best information.
CFE Black is just slightly slower than AA1680. My load is 12.0gns of CFE BLK under a Berry's 220. That's pushing right at 1000 from my 7" barrels. When it's shot from a 16", it's closer to 1050fps. I don't like to go hotter since when the weather gets warmer, I don't want to worry about the velocity increases, and it cycles a standard AR bolt carrier fine in the summer and winter.Anybody have a starting point or a ballpark on the load for this combo?
Man that's comprehensive, thank you. I agree with your assessment with h110. I loaded some berrys at 2.15 and on 9.5 grains and got consistency (1030ish in 60 degree weather) and decent groups. I loaded some up long at 2.250 and 2.260 and they were all over the place. I could hear I had room in the case.CFE Black is just slightly slower than AA1680. My load is 12.0gns of CFE BLK under a Berry's 220. That's pushing right at 1000 from my 7" barrels. When it's shot from a 16", it's closer to 1050fps. I don't like to go hotter since when the weather gets warmer, I don't want to worry about the velocity increases, and it cycles a standard AR bolt carrier fine in the summer and winter.
I'd start at 10.5gns and go up to about 11.3 and chrono the results. Also, magnum pistol powders like H110 (and technically CFE BLK and AA1680) don't like wiggle room in the casings. The more air, the larger your velocity deviations and the lower the accuracy. Try and seat your bullets on top of the column as much as safely possible to eliminate the speed differences, and you'll see your groups will tighten right up.
Also, see the data below from Hodgdon. That's quoting a Sierra Matchking 220, and the Berry's are a little softer, so might take a hair less powder than that. Good luck, try it out and report back. I'm curious to see your results. Hodgdon velocities aren't always accurate, and with a short barrel, you'll definitely be in the clear.
Not Berry's... my 300 loads are below. 11.3" barrel. All stayed subsonic. The Lil Gun seems to do better gas wise. With the gas block wide open and the silencer on, it'll cycle good, but won't lock open on the last round sometimes. Someone told me I need a slower powder with a higher charge so my pressure peaks later. What frustrates me is that Sig factory 220 subbies run the gun great.
220gr Lapua Secnar L, CCI 400 primer, 2.25" COL.
With Hodgon Lil Gun, 8.0-8.2gr
With Hodgon H4198, 10.9-11.0gr