There are many original condition O frame Parker 20's with min wall in the mid .020's. Personally .019 is too thin for me.
I recently measured a O frame 20 that had the chambers extended to 3". The measurement in front of the chamber was .088 and min wall of .022. Not a gun I wanted to shoot, but others would have no problem with it. It all comes down to how much risk do u wamt to take.
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