If you fellows would quit flinching and shooting them in the guts, you wouldn't have any problems...
I grew up shooting squirrels, in the head with an open sighted .22...Never had a problem killing deer...The hunters that show up at our camp with the big bores are the ones who can't shoot and we end up tracking their deer...
I've never shot a deer in the guts with my .243 or any other gun, I guess those that do, need a bigger gun....