I can only conclude that my initial problems were due to muppetry of the first order on my part in using the wrong primers.

The cotton wool filler was quite spectacular as bits of it floated gently across the firing point on the breeze. From the heavily singed chunks I picked up I wouldn't recommend its use in areas liable to forest fires.
Anyway, using my patent 'one target above another, aim at the bottom and hope to hit the top' method, this was the result of four carefully aimed shots. (Ignore the two fliers).
The main problem with accuracy with this rifle seems to lie in the rather coarse barleycorn and vee military sights similar to those on my Long Lee. In the hands of someone with more youthful eyes I think it would have considerable potential.
To add to my joy, when I got home I found a letter from a mate GIVING me his 45/90 Sharps fitted with a long brass, American Civil War style scope......but that's another story.........for another forum.

Brian