john.k,
THANKS for the info. - Fwiw, I belong to a shooting forum in the UK & can likely find someone on that forum who can come up with Martini small parts, if/when I find the receiver to convert to .303 British.
(I thought that I remembered that the barrel threads were the same.)
I once, when stationed OCONUS, saw/shot a Martini-actioned stalking rifle & was very impressed with his weapon.
There are any number of nations abroad, where single-shot rifles & pre-1890 weapons are lawful but modern weapons are prohibited.
(There are at least two nations in the former USSR that do NOT allow "non citizens" to possess repeaters but double-barreled shotguns & single-shots are lawful for hunting Red Deer, wild boar & other game for use by "visiting sportsmen".)
yours, tex