Winterborn
Moved to Texas
Greetings,
As part of my eternal quest to find a subsonic load that will cycle my 300 blackout without a can, I finally got ahold of some AA1680 to try out.
My rifle specs:
1:9 twist AAC barrel, carbine length gas system
3 oz carbine buffer
I tried out two subsonic loads so far with this powder:
220gr Speer FMJBT round using 10.8gr of A1680. This load was very soft and quiet, if not all that accurate (about a 5" group at 100yds). I will tweak it down a bit to see if that improves the accuracy at all.
230gr Lead SPBT, cast from a Lee 300 AAC mold using wheel weight lead. Same powder load as above, and the rifle cycled just fine. No leading present after 20 test rounds (all I made up).
So far so good, seems to operate just fine using this powder at subsonic loads with heavy projectiles.
As part of my eternal quest to find a subsonic load that will cycle my 300 blackout without a can, I finally got ahold of some AA1680 to try out.
My rifle specs:
1:9 twist AAC barrel, carbine length gas system
3 oz carbine buffer
I tried out two subsonic loads so far with this powder:
220gr Speer FMJBT round using 10.8gr of A1680. This load was very soft and quiet, if not all that accurate (about a 5" group at 100yds). I will tweak it down a bit to see if that improves the accuracy at all.
230gr Lead SPBT, cast from a Lee 300 AAC mold using wheel weight lead. Same powder load as above, and the rifle cycled just fine. No leading present after 20 test rounds (all I made up).
So far so good, seems to operate just fine using this powder at subsonic loads with heavy projectiles.