Originally Posted by lagopus
Parabola, chances are my re-bored .410 and yours are virtual twins made by the same person and sold on to different companies. Certainly looks the same in all respects. Mine was bored to take the 2 1/2" cartridge and shoots well. According to the Proof marks the conversion was carried out sometime 1939/40.

I too have a William Moore & Grey gun with a Thomas action which is a double 20 bore and number 1 of a pair. I am yet to find its companion. Lagopus.....


The current Holt's auction lists numerous former rook rifles rebored to .410. This was apparently a thriving business in England at one time. Except for the very high end guns, they mostly carry estimates of &200-300. If they were in the US, they would bring several multiples higher than that.