You would see more thrust force on the bolt lugs with the larger cartridge though because there’s greater case head area for that 65,000psi to act upon.They have mag bolt face short action bolts some where but are not selling them yet. They do have prc rifles just not offering them. I don’t think the caliber matters. There is a max pressure standard so doesn’t matter if it’s 65,000 psi from a 223 or 338 it’s still 65,000psi.