Hmmmmmm, that makes sense. I thought it had something to do with keeping jacketed bullets, reaching up to 2300 fps, from doing as you say. So to infer on the other hand. Is it the BFR intention that they are welcoming the result of NOT having gain-twist rifling to mitigate such occurrences? How they can make it work right with their cut-rifled barrels to keep such maladies from occurring is beyond me. Maybe they are more prescribing in what type of bullets they say their 460 BFR can handle?