I bought a Remington Custom KS in a 7mm STW and cant get better than a 6 inch group at 100yds. I reload and have tried a few different loads and bullet weights. This thing is killing me. Starting to regret my selling of the 7mm Mag and buying this STW. Help me please. Have tried Nosler 140,150 BT and the 160 Accu Bond. Have also tried the Barnes 140. I have used RL22 and IMR 4350.