What is a good powder for subsonic.300 bo in a bolt action? I will be using 208-220 gr. Projectiles.
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Barrel length? Pistol gas? Adjustable gas? Lightweight bolt? Light buffer spring?I am using CFE Black with 247gr cast projectiles, 1050 FPS, cycles just fine and locks back on an empty mag.
8.5" barrel, pistol gas, not adjustable, all standard full auto style bcg, it does have the JP silent captured spring with the lighter spring, it is the SBR'd lower for my 6.8. Been playing around with it, haven't worked out the perfect load yet but tested a string of 10.5gr and 11gr, both cycled fine, locked bolt back and were so quiet I could hear the bolt cycle, hear the bullet traveling to target and a smack when it hit the dirt behind the target. Not sure if I am comfortable shooting deer with a subsonic load or not but should be a good two legged critter stopper.Barrel length? Pistol gas? Adjustable gas? Lightweight bolt? Light buffer spring?
Lots and lots of different configurations on the 300. What works on one will fail in another.