Quote:
Originally Posted by unspellable
I'd always wondered if the chamber step was simply the older 9 mm chamber and they never bothered to remove the step.
Any opinions on this?
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Nope and yep. The "chamber step" was patented by Geo. Luger and was intended to give a positive gas seal. It has nothing to do with the "neck up" of the 7.65 mm cartridg to 9mm.