I have a Model 625-6 and a Model 1950 so I thought I would compare measurements with loaded .45 ACP with and without moon clips. The 1950 serial S1241xx measured 1.606 from the case head to the forward end of the cylinjder when headspacing singly in the cylinder. With moon clip it measured 1.621. The 625-6 measured 1.610 and 1.622. Boith about .015 difference. I did measured all chambers and noticed a greater difference between chambers with the 625 as much as .005. All the rounds I have fired from them have been without moonclips with no misfires. I have read several different commentaries on the new guns working only with moon clips. One sample does not mean much out of the thousands made, so I do not know if it means anything or not. The numbers are really not too far apart for guns made 40 years apart.

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Richard Gillespie
FBINA 102