I have riflew with both styles of magazines. Since I began deer hunting with a rifle in 1967, I have never emptied a magazine in a semi-auto rifle. Once when hunting with a bolt, I took seven shots at a buck chasing a doe. After each shot they would stop and look for a second then run in a new direction She led and he followed. About mid way through the seven shot string, I had a broadside standing opportunity and the firing pin went "click". I opened the bolt to find and empty chamber even though I had a few rounds in the magazine. I stuffed it full and finally got another standing opportunity and put him down. He was so in love and too dumb struck to leave that hot doe. She ran him all over a 30 acre field and if had not been for her attraction, I would have never stopped him.
The morale is, chose your shots carefully and you should almost never have to reload an empty clip, or need a spare. If I were going into battle, I'd consider it, but for deer hunting it is not a factor for a patient hunter.
