.303!? Well, I don't know about moose, but I can vouch for the .303 as an elk killer. It's the biggest gun my dad ever used and he killed elk with it. My brother and I once conspired to buy dad a nice, modern '06 to replace the ancient Enfield he'd had "sporterized" - cut off the military sights and mounted see thru Weaver rings and a K4, and saw off the front half of the stock. He smelled the rat and gave us quite a bit of guff until we finally admitted the plan, and then he really let us know what he thought of the idea! I still can't understand a man turning down a new rifle.