Recoil
A lot of good points being made here. I also have become more recoil sensitive as I've gotten older. Not much fun when you walk away from firing a "big one", off the bench, and have a pounding headache, sore shoulder, neck, even lower back. Arthritis does not help either. Cost factor is also a big consideration: match grade 223 for almost 1/2 the cost of match grade 308. A can of Varget empties real fast at 45 grs. per each 308. The torqueing/twisting recoil of the larger ctgs. does nothing for accuracy, another problem. I just don't believe in using more "gun" than is necessary, and how much does it take to punch a hole in a piece of paper. If needed, in hunting, yes, I understand, a "big one" is required. Whatever works for you.