How much of the chamber end of a 308 Win barrel would you have to cut off to safely rechamber to 300 Sav? It is a bull barrel so there is plenty of meat left to rethread. 300 Sav you may ask. The ultimate goal is to re-contour the barrel to an 1891 argentine carbine barrel configuration. The original sights, etc. would be used. 300 Sav is safe in that action ; 308 Win is not. Please do not cry bubba or butcher. All that currently exists is a bare receiver, barrel with sights and a nosecap. The current barrel is fair. Will see how it shoots before embarking on this money wasting by interesting conversion.