I'm totally at a loss trying to find the factors that either permit or prohibit the use of a muzzleloading rifle of a suitable calibre, that is to say .50cal or thereabouts, for the taking of deer-sized game in England, Wales or Ireland. As a matter of interest, a .50cal ball weighs in at 200gr and at 1850fps makes just over 2060 ft lbs.

This is not for me, obviously but for poster on a US-based site trying very hard to understand the strictures under which we operate here in the UK. He knows about the 'good reason's for possession of a Section 1 firearm here.

Your experience and/or knowledge would be gratefully received and passed on.

TIA.