...ok. It was three years ago when I lived in ND when a woman was hunting with us, using a .243. We spotted a doe at around 125yds so she took a rest and shot. Upon the shot, the deer took off over the hill and out of sight. About 45minutes later, we spotted the doe again, but this time, it was dispatched with a .30-06. To our amazement, it was hit by the .243. And, no it was a GREAT shot! She hit the lungs dead center, but the factory Remington load never opened and only produced a small hole through the lungs...they never collapsed. Except for the hole, they looked perfectly healthy.
A year before this, my boss at NWA bought a .243 Tikka. That Fall, he lost two deer with the .243 and quickly sold the rifle. Wasn't there so I didn't see the point of impact, but these were the first two deer he had lost in around 15 years of rifle deer hunting. This guy was a HUNTER, so I know he was using the proper bullets.
Hey, if the .243 works for you on deer, GREAT!!! I won't use one, but that is because I like .257 and .264 for deer. I would use a .243 for deer before using a 300Mag any day of the week.
Jim