I have both and the 375 is probably what you are looking for. It is basically a shorter 38-55 with higher pressures but can be used as a 38-55. The brass is thicker wall for higher pressure but if you are shooting lighter loads you could trim 38-55 brass or size up 30-30 brass or just buy the right stuff. The 356 on the other hand is a 308 case with a slight rim same as the 307 and I find that brass harder to find.



























