Why not just load a smaller cartridge like a 17 FB and a 22-250? You can achieve those velocities while burning less powder. Less powder costs less, and means you're getting less material sandblasted down the bore at each shot. If you don't need the speed, then why buy that cartridge?
I stopped worrying about barrel life a LONG time ago when I realised a few things:
1. the cost of powder and bullets required to burn out a barrel FAR outweighs the cost of a new barrel
2. 'shot out' means VERY different things to me, and to competition level shooters. When a barrel goes from 0.2" to 0.25" groups, it's still in the prime of it's life as far as I'm concerned.
3. even when it is shot out, that's just an excuse to put a match barrel on it, or to go buy a new gun