300 rum problem

[graystalker]

I'm a beginner at long range and I have just brought a 300 rum in a Remington sendero and im having trouble getting it to group at 100 yards I have had a muzzle break fitted and it beaded any load data recomandations im using 195gr match projectiles and adi 2217 powder and what col

 

[WarKitty]

I'm a beginner at long range and I have just brought a 300 rum in a Remington sendero and im having trouble getting it to group at 100 yards I have had a muzzle break fitted and it beaded any load data recomandations im using 195gr match projectiles and adi 2217 powder and what col

190 or 200 grain nosler accubonds.