I looking for info on reloading this cartridge. I 'am loading 180 gr. nosler Partition bullets with Imr.7828 ,this is very accurate in this gun.The nosler reloading book i have does not list this power? Also i tried 180 gr. nosler boat tails, this rifle did not shoot well ?i am getting 3260 fps. with 86 grs. of power.