Re: .300 WSM Barrel Life and comparison to WM
Well , here is my take on it.
The Old 300 Win mag burns more powder and has a lower shoulder angle which is supposed to help speed up the barrel wear I personaly haven't shot both enough to see any differance , I do know that the 300WSM doesen't shoot the heavier bullets as well as the Old 300 does like 200gr and up. Both should do what you want as they have both proven themselves at 1000yds
BUT don't give up on that 308 , it'll do a good job at 1000yds to with the right bullets. And if your gonna spend the money to have a new rig build and your recoil sensitive then you could look at a smaller caliber like the 6.5-284 , 6.5-06 , or my new favorite the 243 Ackley improved almost no recoil to speak of , large varity of long range bullets and good Lapua brass available (also for 06 and 284 bases)
so unless your wanting to hunt big game at 1k why beat yourself up?