I always load a rifle for the range I'm going to be shooting and the target I'm going to be shooting at. If I'm taking a shot inside 50 yards, I wouldn't take a magnum. Way too much velocity inside 300 yards for most bullets to perform like they should. I recently shot a deer with 150 hornady sst inside 30 yards from a 308 winchester. Deer had no heart or lungs after that. Velocity was kept low to maximize the damage done at close range.