So I have a 300 ICL ( weatherby improved ) loaded with 165 barnes x, 7mm rem mag loaded with 160 barnes x and finally a 6mm rem with 100 speer spfb, my dilemma is which round to use, shot seem to be with in 400 yard shooting up hill, on avg size mule deer, im not worried about the mags blowing the deer in half with the barnes bullets. just trying not to punish myself with recoil if i dont have to. the 7 mag is the heaviest and kicks the hardest, the 300 is the lightest but with the muzzle break its the longest by 4 inches, the 6mm is manageable with recoil but with the flat base its not going to carry the best past 300 yards. i can shoot the 300 and 6mm the best, the 300 shoots alot tighter than the 6mm, i know im loaded for elk with the mags but should that suffice for deer without being too overkill?