Quote Originally Posted by davederrick View Post
Helpful post, thanks. 1899 was the thing I was thinking of. Thats how I got my Martini Henry out of the US, exported without restrictions as prior to 1899, imported without restrictions as obsolete calibre. Cool.
Yes! Date controls in the US: obsoleteness of caliber controls in the UK (for cartridge guns).

If your Martini Henry rifle were made in 1899 or later, it would have been readily importable into the UK: but NOT readily exportable from the US.

The US laws aren't-always more lenient than the UK's.