Tangentially germane to this is the kiplauf I have that utilizes a very similar action. Its (original un-lined) barrel is chambered for 5.6x35R. Bore is a bit odd with a .225" groove diameter and a fast twist of 1-9". Out of respect for the old girl I load 52 gr. gaschecked bullets from a Lee Bator mould sized .226" with 6.0gr. 2400, Hornet brass neck sized with a custom expander. Quite a fun little rifle, and seeing this pistol has given me something to keep my eye peeled for as a companion piece.
