A few days ago ya'll were good enough to help me identify a rolling block I purchased from Merz Antique Fire arms. It was advertised as a 32 rimfire. I wanted to convert it to 32 wcf.
After a through cleaning, closer inspection, internet research, and advice from this forum I determined that I have a no. 1-1/2 originally chambered for 32 rimfire long. The rifle already has been converted to 32 wcf. Apparently this was done years ago by a very competent gunsmith. A new Starline case and rounds loaded with .313 dia cast bullets in new cases chamber perfectly. The loaded rounds fire as they should. Unfortunately, I still have a problem.
I have a new Uberti Peacemaker from Cimarron and a new condition Mod 53 Winchester (Browning/Mikuru) in this calibre. Both shoot fine and cases fired in either fit in the other before full length resizing.
Cases fired in both these guns will not fit in the rolling block. Even after full length resizing in a Lee die they still get too tight to chamber about 1/4" before the block closes. A light whack with a wooden hammer on the block forces the case into the chamber, but it takes another whack to unchamber the case.
I rented a reamer from Elk Ridge and carefully recut the chamber. This reamer is advertised to cut a SAMMI minimum spec chamber. It hardly seemed to cut anything and the chamber is still too small to take a full length resized case. Headspace is correct.
I rented the only reamer Elk Ridge has and I am reluctant to rent another one until I know I will not have the same problem. Is there any way to polish out the chamber without messing it up?
I have tried measuring the fired cases with a good caliper and it appears the cases fired in the other guns are about .001" larger than those fired in the roller. I looked up the SAMMI specs and it appears the new chamber does conform, while cases fired in the other guns are about .001" too big. I would like to use the same cases in all these guns.
Any help appreciated.
Steve K