Unless you're striving for BR accuracy, then I'd load 64 gr. of RL22, sight in, and go kill whatever you shoot at.
That right there sounds like a plan.
I personally don't like to work at the upper levels of pressure tolerances because it leaves you less room for error, and lets face it. That load is a winner.
Honestly, unless you're hunting brown bear or something I'd run that Sierra and not even worry about the NPT. The way you're hittin' you're golden w/ that projectile, particularly if you're going w/ the HPBT Game King version... elk'll fall to the authority of that load no doubt.
