German gunmakers, an independent lot at best, took pride in those days in making their own alterations to various designs, and coming up with their own cartridges. Many of these — maybe most — went unrecorded by posterity, and since this was the very early era of cartridge rifles anyway, who knows?
Unusual calibres - there's no reason they can't make good go-to
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Sound arguments for the purchase and use of firearm suppressors” A
An Odd Cartridge in an Odd Rifle - Gray's Sporting Journal
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German rifles Archives - Gray's Sporting Journal
