I have a Star Firestar that I bought originally in 40 S&W, but found a 9 mm slide assembly which works perfectly, making for a neat dual caliber package. What I was pondering was whether I could re-chamber a 9 mm barrel and fit it to the 40 slide to give me a "Three-fer." I have had a hankering for a .357 Sig for some time now, but can't see my way clear to buying another gun now.
If this would be do-able on the cheap (barrel plus reamer) it would make a neat project. What say ye?