:-D I have a 700 ADL 243 that was bought new in 1976, my father killed his first buck with it, as did I, and also my son when he was 8 killed a doe (his 1st). I reload for 4 other guys in this caliber and to be honest, I think alot of people push this caliber faster than needs to be. 3 of these i load for are 700's and the 4th is a 788, all of these guns love SIERRAS and REMINGTON bullets 2 shoot the Hornady decent but I use the SIERRAS IN THE 100 GR PROHUNTER. Back this with 34 gr's of IMR 4064 ( I know that is a little light but it gets the job done and has for the 20 years I have been loading for it) but I do a little something different I use MAGNUM PRIMERS and I love these, I have used regular lr primers and BR LR PRIMERS but the MAGNUMS seem to be the little added touch that is different.
As for stopping power and accuracy, I had a guy who was a true 270 fan swear off and bought a 243, now he has 2 in 243 and 1 in 6mm( was just a good geal when he bought it) We do occasionally shoot over 200 yards at a deer but most are within 100 yards. But WHISTLEPIGS are living dangerously out to 300 (long shot here in my home county land is too rolling). I would definintely recommend just necksizing though with this caliber as it seems to help tremendously with accuracy as well as case life expectancy.
The 75 grain hornady HP'S are extremely accurate in every gun I have loaded for but they do not like to be pushed fast, and they do a terrific job of opening up when hitting a GROUNDHOG, but wouldn't recommend nothing under 85grhp for deer, as the 85 GRHP is what the SIERRA BULLETSMITHS recommend for this calibe in deer sized game, ( when I reduced the load slightly for my son when he started shooting)