I don’t have one so speaking from limited experience here but I was just shooting a buddies 458 SOCOM and another guys 450 Bushmaster a few weeks ago comparing them. I would build a rifle so I could get a nice recoil pad on the butt stock and consider a fixed stock or a really solid adjustable. I don’t think going light weight would be my priority. Either way you’re going to have fun with them but a little bigger gun might be more enjoyable on the range.