doublegunshop.com - home Forums General Discussion German & Austrian Sporting Guns @ doublegunshop.com 12.7 x 60 RD (500 bpe x 2 3/8)

Recently acquired a double rifle.
Proof marks are Austria, circa 1890's to early 1900's
No nitro marks, so black powder.


Bore is 12.8 mm, (0.504")
From the chamber casting, its a 12.7 x 60 RD


Its a continental version of a 500 BPE in a 2 3/8 length, rather than 2", 2 1/4, or any of the other lengths up to 3 1/4.
Case length falls between the 50/70 and 50/90, and closer to the 50/90.

This seems to be a bit of an obscure round, and I have only located 1 image of it and no technical information.

I have figured out a few options for parent brass. None are trivial
Even the 500 nito will require a reduction in head diameter and a slight modification to the body taper.


Does anyone out there shoot this round or know anything about it.

Any knowledge on the original specks for the factory rounds - powder charge or bullet weight.

I suspect I need to start somewhere in the ball park of the factory loads or regulation of the round will be an issue, and I am trying to save a few iterations.

I have worked with obsolete shells in the past, but never in a double and never with one this hard to find information on.

Any assistance or advice is appreciated.