Can you confirm on the underside of the left tube below what may be a "J" or pointer/arrow along with the Krupp steel tube type there is a "Caveman" with a "Staff"?? 1st I'd ask that you join the German Gun Collectors Association(
www.germanguns.com ) and support the cause. Either the info may appear in upcoming journals or you can purchase back issues, which of course can be purchased without being a member. There isn't one source as of yet. 2 9/16" would equate to 65mm. RST has a fine line of hunting cartridges while Polywad(
www.polywad.com ) carries quality plinking and target type cartridges. Gamebore's F2s are excellent and for some reason make a distinctive sound as well as can be picked out of the crowd when ignited, but are difficult to locate in American large shot sizes. Occassionally Midway(maybe 12 bore only??) will have them on clearance. Firearms Service in Kentucky,
www.firearmservice.com ???, sometimes is a source.
Kind Regards,
Raimey
rse
