It looks like everything is O.K. except the 25-06 neck O.D. is .290" and the .257 Wby is .283". I have a .257 Wby case fired in a chamber that I didn't cut and the neck O.D. now is .294". I don't like the idea of putting mikes on reamer flutes, and I don't have a case fired in a chamber that I cut, so I don't know if .294" is excessive for the .257 Wby neck after firing, but it seems like it is. I don't expect the .257 reamer to clean up the neck of the 25-06 chamber except in front (for the .050" or so extra O.A.L). If I set the barrel back .308", the slightly longer Wby neck will completely clean up the old neck. I just hate to give up .3" of barrel if I don't have to. I don't have to do this, it just seemed like a great way to use a good barrel. I also posted on Weatherby Rifles Forum. Experience or opinions ? Tom On edit: change .291" to .294". Between my garage and study, my one brain cell decided it was .291" instead of .294"