Mark..... the only correct way to determine frame size is the exact distance between firing pin holes, center to center.
1-5/8” is off the charts. A 7-frame is 1-7/16”
But I think your measurement is the width of the stock head. But this is not the way to determine frame size.
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"I'm a Setter man.
Not because I think they're better than the other breeds,
but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture."
George King, "That's Ruff", 2010 - a timeless classic.
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