The K32s produced in 32 H&R have been reamed out for 327 as well as the K22 cylinders. Both are the same diameter cylinders and have very acceptable safety margins according to the custom smiths that perform this work.

Metallurgy has not changed for those cylinders since 1945 when S&W substituted improved steel for their old heat treating process begun in 1920.

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Jim
S&WCA #819