quite a can of worms I have opened here
ALL of it is EXTREMELY interesting
Thankyou all very much for taking the time and interest to reply
I have no intention of using longer shells than the chamber allows
A point we may have overlooked is________________ tho and a half " shells were generally about ounce and an eight of shot
Two and three quarter were ounce and a quarter of shot, AND there lies the crux of it
I will be interested to see the replies

Cheers Pete