Given two loads with equal velocity, but one which is 8000 psi vs the other at 13,000 psi, it would stand to reason that recoil should be equal, but wear on bolting and jointing surfaces would be accelerated with the higher pressure load.

Pretty much any mechanical device wears out or breaks quicker as you run it near or beyond its' design limits. Indy and NASCAR cars go like hell, but they sure don't go 200,000+ miles between engine rebuilds.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug