What advice would you give to a friend of mine who has hunted with a .243 for almost 15 years and is now wanting a .300 win mag? His .243 is a Remington model 7600 and kicks like a .22. I explained to him that the change in recoil will be incredible. He says he has shot a .300 but probably not more than a handfull of rounds. He shoots his .243 quite well, but I also told him that he may develop a flinch if he jumps that gap. I was just wondering what some of you guys think about this situation. On a side note, I also explained to him that a .300 mag may be a bit much for our smallish Alabama deer. Your opinions are (as always) appreciated.