These loads came from one of my best reference reloading books ( Ken Waters Pets Loads ). He said " that MRP powder took honors with the 85 grain bullets ". Here are a few more of his loads with MRP.
85gr Sierra HPBT / 48.0grs of MRP / Win. primer / 2.72OAL / near max. / best accuracy in 85gr bullet
100gr Sierra / 44.5grs of MRP / Fed 210M / 2.70OAL / moderate / very accurate
*Just remember that these are someone elses load and work up to them.
Even though these are older books Ken Waters Pet Load Vol. 1 & 2 are one of the best reloading books that you can own. Ken put alot of research into every caliber, gun, bullet, primer, powder and tested all of them. Giving great detail on his findings. Great reading.
Ken also developed the 7x30 Waters cartridge.
GOOD LUCK with the loads.