Dean, what kind of "tedious measurements" were involved in determining that your ten gauge was a #2 frame gun. It's all about the pin separation and that would not require any "tedious" measuring. It is also very clear that what the PB guys described as a 2 3/8 frame was actually a #2 frame. It is all very simple to figure out if you look at the chart on page 527 of The Parker Story. 2 3/8 is a bolster measurement just like the 2 1/2 is a bolster measurement. The explanation of this goes back to the 2013 threads that explain it very clearly.
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