a 243wssm is a good roud but it is also a barrel burner,I have one and it shoots well out to a 1000 yrds, but if I had it to do over I would have just spent a little more money and done a 6 BR,it will push a 95 grain berger 3000 + and the barrel life is alot longer, and your only using about 30 grains of powder, put a break on them and you can watch them hit. they are a sweet shooting round.
I have a .243 WSSM in a Winchester Stealth. It likes the 95 grain Berger, good. I head shot a coyote at 626 yards. The longest shot before that was a head shot doe at 602 yards. I will shoot out this barrel and have it rebarreled to .243 WSSM, again.