Hunt it. I was told by a very good gun maker to only clean my gun when accuracy is not what it used to be. Now that said, if your in a Wyoming wind storm and your dumping grit out of your gun you should probably run a patch or two:)
I would get him a 6.5 creedmoor or 6.5prc. My son shoots a prc that has a break and we will be replacing the barrel soon. My point to that last comment is he shoots it a lot. He enjoys it, it’s easy to shoot 50+ rounds in a few hours and there is nothing better than time behind the trigger.
I have a Stone Glacier and it works great. As unmanly as it sounds, learn to stretch. Hip Flexors and hamstrings need to be stretched regularly. I have had back injections, back surgery, countless PT sessions, personal trainer, one of those fancy beds, and just about everything one can try to...