Brian, check out this spec from SAAMI:
It shows that case length spec is:
2.015" -.020" (from 1.995" to 2.015")
50.18mm -.51mm (from 50.67mm to 51.18mm)
Note that SAAMI specs are voluntary; it's up to manufacturers whether or not they go along with it.
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Last edited by Bart B.; February 13, 2013 at 12:05 PM.
Reason: Typist had bad math or fumbling fingers on mm specs