Thread: Subsonic 300BLK Noise levels

sounds like the American Eagle ammo is still going supersonic in your rifle. If the load is too close to the speed of sound then you can get some rounds cracking and some that don't. Many variables, High above sea level, neck tension etc.
When im trying different Sub loads in my 308, I load in 3gr weight drops then when I get to a load that doesn't crack, I double check the next load below it and if its still subsonic then that's my load. Nothing worse than choosing the first load that doesn't crack then have some crack when you are out hunting. Usually around 950-980fps do well for me.

For a few years I have been casting and shooting 180gr HP lead subs. They bore me now and don't like the possibility of leading the barrel and needing to clean it before using high velocity ammo.

I have finished my next load a few days ago. 140gr Barnaul sp projectiles, have not chrony'd them yet. 8.7gr Trailboss, Murom mag primers. These were the first projectiles i tried when playing around with subs 6 years ago. Shot well. The Barnaul FMJ shot even better.



Dave

Hi there! Any chance I could purchase a loaded round to add to my cartridge collection?
Cheers,
0274791855