300 BLK Subsonic

I used cfe black and had good success with Berrys 220 grain at 12 grains.

Also used the Hornady subx bullets but they sometimes hang up on the feed ramp on the first round.

1680 is good, but for whatever reason I think it’s louder than cfe black
 
For Subsonics I load:
Lapua 200/gr Subsonic #4PL7060
H4198
CCI Mag Primer

If I remember correctly, 4227 is claimed to be a very quiet powder for Subs, but I have not tried it yet.
 
Playing: Berry's 220gr over SW Blackout. Clean, pretty quiet, cycles and AR15 very well. N110 and H110 were very quiet and clean, just didn't cycle my rifle very well. No idea on a good sub hunting bullet, I think there's a couple sub specific hunting bullets out there.
 
10.5 gr 4198 on 200gr bullet works my hardened arms upper 16 inch. has a pistol length gas system. please check know published data before using warning. fwiw.
 
How about AA #9 instead of H-110, I have plenty of that, and zero H-110.

Interested in loads with faster pistol powders as well.
I haven't had a ton of success with AA#9. The load data is limited anyhow. H110 doesn't have any data I've seen for subsonic.

I use IMR 4227 and CFE BLK with Berry's 220gr bullets and I have had great success, more so with the latter.
 
I’m actually going to load some 300 blackout today. I tested 11.5-12 a few weeks ago and now I’m going to test 11.9 and 12 at 2.2 with starline brass and cci 400s. Berrys 220 grain bullets.

If I remember, for whatever reason these were shooting low and right compared to supersonic.

Going to do some testing where I can really lock down a load I like that shoots consistently subsonic.

I’m loading for a JAKL pistol if that gives you any more information.
 
I haven't had a ton of success with AA#9. The load data is limited anyhow. H110 doesn't have any data I've seen for subsonic.

I use IMR 4227 and CFE BLK with Berry's 220gr bullets and I have had great success, more so with the latter.
Nosler #9, pg.464 has sub .300 data with a 220g. bullet. 110/269 are among the powders used.
 
Hodgdon- I do not own a 300 Blackout. Google info-
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