tinker - there were 2 "Howdah" pistols, Cal's in .577 Snider.

I shot it holding with 2 hands to control the recoil but younger (and tougher!) guys than I shot it one handed with more control than I could manage

Rule 303 - the silenced .303 was a copy of a deLIsle carbine, a rare rifle used by British commandos in WW2

A shortened MK 4 .303 bored out to .45 ACP for the subsonic round to make the built in silencer more effective

IIRC the one at the shoot was made to take the standard 1911 magazine.
It was very pleasant to shoot with little recoil and noise
A friend in the UK has both, a good copy and an original which he paid a lot of money for

Daryl - I am not familiar (without references) with the difference between the 1922 and 1928 models, only the wartime M1 version had a side cocking lever

It was, however, fully automatic and a real blast to shoot!!

Unfortunately the Hotchkiss with its strip magazine was a little temperamental

Again, many thanks to all involved

TH44