The MIM parts are already pretty smooth and the medium stone used on the old cast parts does not help smooth these parts, in my humble opinion. On new MIM part guns, most of the problems come with oversize hands causing interference with the ratchets at the end of the double action pull. If you shoot all single action, this is not as much of a concern. The MIM guns I have worked on only need to have a thinner hand to make for a good double action. That is IF, and a big IF, all the ratchets are consistent. If not, then there is more work involved.

I had a Master Action job put on a MIM 627-2 and found the only real thing done to smooth the action was to polish the yoke barrel, or should I say overpolish!

I will not have one done on any of my guns.

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Richard Gillespie
FBINA 102