I just got done cutting down the barrel for my Winchester m70 in 338 win mag, and installed an Alaska 360. Topped of with a night force 2-20. I will be hunting moose in Alaska with this rifle. I am not expecting to take a shot much over 300 yards. My question is bullet weight. Should I go a lighter bullet because of the shorter barrel? I have a handful of 225 grain and 250. I have loaded 250 for it previously because I found that the 225 fell behind the reloading bench and I forgot I had them.