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.

A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.