300 blk 180 grain bullet loads?

[mrcheesemoose]

Does anybody know if its possible to create a load in 300 blk with a 180 grain bullet? Specifically the hornady softpoint flat bottoms. I have a bunch of these bullets for 308 hunting, but I was thinking I might be able to put them through the blackout. I have cfe blk and 1680 and a 10.5 in barrel to run this all through.
If anybody's done this before that would be helpful, especially if you have a load that works and won't blow up the gun or cause squibs.

 

[wvfarrier]

I dont see why not. I run a 176 grain Lehigh Projectile and a 200 grain Makers at subsonic speeds, using H110 and Lil Gun.

 

[Landon4]

I’ve used cfe blk with 190 subx bullets. I want to say I was using around 10 grains of powder but I’d have to check it’s been awhile since I loaded any 300 blk

 

[alamo5000]

 

[alamo5000]

 

[mrcheesemoose]

Hmmm the hodgen and hornady data seem to indicate that you are unable to. However if wvfarrier can get 176s to go sub I guess the 180s you can too? Whats your load for the 176s?

 

[Downtown]

Are you specifically asking for a subsonic load? That weight would not be subsonic in my rifle with 12" barrel. Shoots fine, just a little loud.

 

[Jgault]

I’ve dabbled a little with 180’s in blackout. For blackout I pretty much only use enforcer, which with 13.5 grains of enforcer would do what you need. 180 is just a bad weight for me in the blackout, for hunting the 110 vmax is devastating inside 150 yards and holds together well with near perfect expansion, just because of the price I use 125 tnt’s for range use, the 180 is in that middle ground as to heavy for decent velocity and will have little to no expansion and to much drop and lighter than ideal for subs.

 

[mrcheesemoose]

Are you specifically asking for a subsonic load? That weight would not be subsonic in my rifle with 12" barrel. Shoots fine, just a little loud.

Yes subs only

 

[TheOfficeT-Rex]

Playing around on GRT looks like you won't be able to keep it sub with either powder even in a 10.5. It also pitches a low burn rate error, and with 65% case fill, I'd believe it.

 

[mrcheesemoose]

Ok guess its not worth it then

 

[db2000]

A1680 10-10.5gr in that length barrel probably. I’m subsonic with 190 gr and 11.5gr A1680 out of an 8” barrel.


7/23/22
94F 47% 30.01 in

A1680 190 Sub-X
Starline brass new
GM205M
COL 1.3580
BTO 1.635
11.2 974, 968, 1016, 984, 963
1028, 965 SD 26.1
11.3 1004, 984, 1005, 1039, 983 SD 22.6
11.5 1048, 1014, 1056, 1005, 1016 SD 26.1
11.7 1082, 1043, 1042, 1040, 1038 SD 18.5
12.0 1119, 1101, 1090, 1057, 1079 SD 23.2