308,7mm08,260 and 243 are all the same case, just different calibers.. The difference in recoil of these rounds in the same gun will be from bullet weight. So 243 would be the lightest recoiling and then 260, 7mm08 and 308.. A 243 would be more than enough for any deer in NA and there are tons of bullet options, so why chance buying a larger caliber when it is not needed..