Hi SKB,

When I saw the picture of your Moore 2-groove I thought it might be the same rifle as pictured in C.W. Thurlow Craigs 1952 book Shooters Delight.
Now you have give the bore measurements it clearly isnt as his measured .375 bore and .432 grooves, with a two cavity mould throwing an 88 grain belted ball and a conical winged bullet.
He wrote that it worked well on hill rabbits in Wales.
It is illustrated in his book, but I have only just registered with the forum and dont yet know how to post the image.
I could email a photo of the page if you like.
Happy New Year Everyone!