I've loaded up some 7.5x55 with Graf's Brass and 150gr Winchester Softpoints through Lee dies and so far have experienced no problems firing them through the K31icon and M1911. Granted, I've only fired five or ten rounds through the K31 and about 20 through the M1911, but so far things are looking promising for both rifles. The powder used was the starting load for H414 in the Lee Manual, which gives pleasantly moderate recoil.