Originally Posted by Tysoncartertrucking
Live in northern Canada and cannot buy powder anywhere since the gun control scare in the states my options are pretty much 4350 and retumbo gun will be used for long range shooting as well as hunting
Retumbo will be a much better choice for the 180s in the 7mag.
Berger lists 69.2(2881fps) as max for Retumbo and the 180s. I was shooting 68gr at about 2900fps in mine, not sure what max was in my rifle. Berger lists max with IMR 4350 at 55.7 (2705fps)
175fps difference in listed velocities. I have found Retumbo to be one of the best powders for 180gr bullets in the 7mmRem.