I am preparing for a Elk cow hunt and I will be using Remington 7mm magnum rifle. I am using 150 grain Nosler ballistic red tip bullets having had good experience with them on Mule deer so I figure Elk cow would be similar. I would like to get consistant grouping that I am not getting even with premium grade ammo. Can someone give me recommendation on a ideal powder weight using Alliant Reloader 22 powder? Here in Arizona shots can sometimes be long distance especially when chasing White Tail or Mule deer in the desert.