FRAME SIZE

[Roy Marcin]

Is there some where I can find the measurement for the frame sizes?
The barrels on one of my Parkers are not marked and I would like find out the frame size.

[Jim DiSpagno]

The serialization book and the Parker Story

[WmRike]

Or, you can measure between firing pin centers.
1 1/8" = #2
1 1/16" = #1
1" = #0

That covers the most common frames, 12-20 ga. There were some half sizes thrown in that will measure the same as the above, but those frames are materially narrower across the bolsters inasmuch as they were made for thin-walled barrels.