If you have ever seen the permagel tests from Alexander Arms for 50 Beowulf you could see the 300gr appeared to be tougher than the 325gr. There is a cool video on youtube of a guy shooting them into modeling clay too. My NULA bore is just too tight and im overly protective of it, especially with the really light contour. It would be nearly impossible to replace if something went wrong. The 50 Beowulf is a near perfect comparison as far as velocity. I also have some Rainier 50cal 335gr plated bullets. Construction looks similar to the old Speer 325gr and they are really really really cheap at MidwayUSA. Close to $20/100 last time i looked. AA used them also in their ammo.
$22/100 now
https://www.midwayusa.com/product/10...d-hollow-point