Grandson bought an old bubba No4 mkI a while back. His first rifle with his money, he's 13. He has really been fascinated by the rifle, seems to be dealing well with the recoil of HXP milsurp ammo. I'd like to duplicate the military load as well as we can...I have some Grafs/Hornady 174 gr .312 bullets, some new Hornady brass, every flavor of IMR powders and most primer brands. I understand it's a good idea to fireform the new brass with the rim held firmly against the bolt face, either with an o-ring or a secondary shoulder on the neck?
Any tips at all greatly appreciated.
