I couldn't say for sure.
It's been many years since I shot a factory loaded .243 cartridge. In fact, I can't remember the last time.
Dad had a box or two when we were out calling coyotes in the early 1990's, and he/we were shooting it up for the brass. I only remember because he had one cartridge that misfired, and I killed the pair of coyotes that came in. A few minutes later, he took a third coyote from another pair that came in. Niether of us connected on that fourth one, but we sure warmed it's tail on the way out.
Those were 100 gr Remington Core-Lokt, and I don't remember if I was shooting them too, or just dad.
But, back on topic, any of them will kill a deer fine, as long as you hit it right.
Daryl