from what ive been hearing from other hunters is that a 7mm round would work good. id go with a 178 grn hand load by barnes or hornady. ive also heard great things of the win supreme fail safe.my 7mm is sighted in for 300yds with 150 grn rounds and it also has a bi pod on it. my other question is what is some of the best shots on a moose.would a neck shot or a front shot at the base of the neck take one down for theese are some of my favorite deer shots.