I could smell the burnt ass hairs in a 6 Creedmore thread I posted in about six months ago......seems like this Creedmore thing defies all common physics.
Apparently only the cool kids run cases based on the shortened 250 Savage and 308 cases 300 fps beyond the parent case in same caliber chamberings; "efficiency" is usually a part of the buzz.
For the OP: My ledger shows either 41grs Rl-17 or 40 grs. I4451 in the 220 Weatherby Rocket (PTG reamer throated for the 75 Amax at 3.010 max OAL) producing 3,400 fps with the 80 Amax. The first load in a 24" bbl and the second load with a 28" bbl.
Beware, this is internet data....
