Magnum no, flat shooting yes. I hunted with Jack Oconnors favorite .270 win for years before finding my ideal .257 WBY. Flat shooting, lightweight, minimal recoil and powerful enough for any sheep or goats or similar size critters.
How often have you fired more than 2 at gameé I seldom fire more than 1. 3+1 is more than enough for every animal I have ever shot by a wide margin.
Not very often for sure. But I want enough rounds in my gun to be able to hit a critter a couple of times and even if I miss once or twice (yes it happens occasionally even at close ranges) I still have a couple in my gun for the hike down and I don't have to carry extra rounds in my pocket. I suppose it's personal preference more than anything.