I think it'd be cheaper to scrounge up a second barrel to re-chamber than have PTG or Manson grind a custom reamer to push the throat forward. Most of these conversions I've seen done took a lot less work than what you're gonna see here. I'm just doing it my way
Why? because
At the moment we're waiting on my "care package" from McMaster-Carr to get here then we'll get rolling on making a couple new guiderods. Ought to be here tomorrow
Cheers
Bill