I recently loaded for a fellow range club member, MagPro for his two .270 Win 24" barrels. He wanted 150 gr Ballistic Tips loaded for a lifetime tag hunt because he read an article by a hunter he reveres. We settled on an amount of MagPro that produced a velocity of 3025. He practiced this load up to 535 yards. We used Rem 9 1/2 Magnum primers. He gave me a couple of back strap pieces and some burger. The antelope head is being mounted. He was happy with the terminal performance of the Nosler bullet. He hit only one lung, because of the angle of incidence, but the expansion was impressive and the antelope bleed out in a few bounds.
I have loaded MagPro for my three .270 WSM Browning rifles. I find superior velocity with 150 gr bullets.