Originally Posted by SWN
I would not get my hopes up on any 7MM UM nearly mirroring Kirby's Allen Mag.
Why not? The case capacity is nearly identicle. The problem before was the poor remmy brass. If..and I say if ... one is able to load the new Burtram brass to the same PSI as the Lapua brass, why couldn't I expect comprable results?
The whole reason everything built off of the 338 Lapua case works so well is the fantastic brass!!