300 blackout loads???

Sharkbite · November 15, 2013, 08:09 PM

Hey all,

Im having a real problem finding the powders normally preferred for the 300blk

Looking for a good 220 gn load to run thru a 16" carbine gas system. The powders i have are:

H110
W296
A2200 and
Imr 4064

Ive worked up a nice supersonic load with 125 SST and 296, but the sub loads are not running the action

Any help from the experience here would be great

Thx

oldpapps · November 15, 2013, 08:46 PM

I don't currently do subs but...

Most listings for subs use lt'gun and A1680 (and some others) but not 296/H110.

I don't have/want a 'can' and I understand that the back pressure of the 'can' makes a difference.

Try looking on 300blktalk for more and better information than I can provide. Port size and buffer weight and.....

With safety,

OSOK

Whisper 300 · November 16, 2013, 03:52 PM

I use 8.9 gr H110 under a Outlaw States subsonic 240 gr softpoint- CCI small pistol magnum primer in a 300 whisper (aka 300-221 Fireball or 300 BLK)
bolt gun and it runs at 1050 +/- 8 fps out of a 16" Lilja barrel.

I can hold 3/4 inch groups at 100 yards and with the "can" is is indeed whisper quiet.
Easy to hear the bullet impact.

Have NO idea if it will work the action on a semi but according to a few guys locally who have it in the AR platform it is very difficult to get subsonic rounds to cycle in the AR.

I have also used the same recipe with a 220 gr. lead cast hollow point (NOE custom mould) with good success.

Again, no idea if it will cycle the action.

Good luck and post any results you get with what you try.

Gary

November 15, 2013, 08:09 PM	#1
Sharkbite Senior Member Join Date: November 4, 2013 Location: Western slope of Colorado Posts: 3,679	300 blackout loads??? Hey all, Im having a real problem finding the powders normally preferred for the 300blk Looking for a good 220 gn load to run thru a 16" carbine gas system. The powders i have are: H110 W296 A2200 and Imr 4064 Ive worked up a nice supersonic load with 125 SST and 296, but the sub loads are not running the action Any help from the experience here would be great Thx Last edited by Sharkbite; November 15, 2013 at 08:16 PM. Reason: Poor verbiage

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November 15, 2013, 08:46 PM	#2
oldpapps Senior Member Join Date: September 22, 2011 Location: Middle America Posts: 518	I don't currently do subs but... Most listings for subs use lt'gun and A1680 (and some others) but not 296/H110. I don't have/want a 'can' and I understand that the back pressure of the 'can' makes a difference. Try looking on 300blktalk for more and better information than I can provide. Port size and buffer weight and..... With safety, OSOK

November 16, 2013, 03:52 PM	#3
Whisper 300 Senior Member Join Date: December 29, 2006 Posts: 155	I use 8.9 gr H110 under a Outlaw States subsonic 240 gr softpoint- CCI small pistol magnum primer in a 300 whisper (aka 300-221 Fireball or 300 BLK) bolt gun and it runs at 1050 +/- 8 fps out of a 16" Lilja barrel. I can hold 3/4 inch groups at 100 yards and with the "can" is is indeed whisper quiet. Easy to hear the bullet impact. Have NO idea if it will work the action on a semi but according to a few guys locally who have it in the AR platform it is very difficult to get subsonic rounds to cycle in the AR. I have also used the same recipe with a 220 gr. lead cast hollow point (NOE custom mould) with good success. Again, no idea if it will cycle the action. Good luck and post any results you get with what you try. Gary