Picked up a Cooper rifle in 257 WB Mag with a 26" barrel. Just breaking in the barrel with 100 gr Norma Spitzers and holding 1/2 group at 100 yards. Need help with which ammo to use for fall hunting in Michigan for Whitetails. Shot as close as 50 yards out past 300 yds. Choices Current 100 gr Spitzers 110 gr Noslar Accubonds 115 gr Noslar Ballistic tips 120 gr Noslar Partion tip 100 gr Barnes TSX Hopefully can use the same round for a trip west for Mule deer hunt if I can work it in. Not getting into reloading so thee seem best choices.