I have never found a gun I was afraid to shoot, but I have met guns (particularly rifles) that I could not shoot well because of recoil. Once things get beyond .300 magnum for me, I just can hold a decent group, or really concentrate while shooting like I can with the easier recoiling calibers. As such, thats the largest rifle I own, any bigger is a waste for me,as I cant put it to good use.

As I've gotten older, and racked up a couple thousand centerfire rounds shot, I've found I like small, mild caliber rifles the best. I carry a .243 deer hunting alot now just because I shoot it so darn well, I can make shots that I couldn't with other rifles, and thats what counts.

Every shooter needs to find their own personal limit, and stay on the sane side of it. Learn to shoot what you physically can, well, and you'll never find yourself in a situation where you cant humanly kill the quarry you're after.