Like others have said, whitetails don't need premium ammo and try different brands. My Remington 700 30-06 prefers Winchester 150 grain power points, groups are half the size of core-lokts. My Marlin 336 30-30 just loves the $11 a box 170 grain Federals from Wally World, I've shot many groups under 1/2" at 100 yards using them.