Thought about trying to see how slow I could get the 245 gr Misouri Bullet co. coated boolits to go and still run my SBR action. Got it down to 650 fps but would not hold bolt open and had some unburned powder. Settled on 750 fps using 7.7 gr of 4227 with CCI 400 primers. This ended up being an absolute blast to shoot. Holds the bolt open, burns all the powder, and is soft, smooth and quiet.
The setup is an 8" SBR with a titanium carrier, heavy buffer, carbine spring, wide open adj. gas block, pistol gas, Opened up M4 feed ramps, D&H 20 rd 300BO magazine (rib set back for fat boolits) and a 45 octane suppressor.
The boolits were ordered at .311 which was essentially as cast and coated (not much resistance through sizer). I ran through 160 rounds today without any FTF issues. Brass made nice little piles at 4:00 and the round was plenty accurate. I did not shoot any groups from the bench but will do that soon.
This is not a hunting load or a defense load. Just something to shoot that is easy on the wallet, gun, ears and targets. Makes about 290 ft-lbs of energy at 50 yds. Drops like a rock. I use a 50 yd zero.
Next will be some of my own NOE 247's I am coating this weekend.