for a 300wm rifle that is going to be fitted with a can, whats the commendation? the purpose of the gun is a long range tac driver. i have an FN SPR A3 with the 24" bbl in .308 and this is going to be my longer range gun in 300. i mean the off the bat con i see is the overall length, can anyone add some input here and help out an old grunt?