Ahh chaps you miss the point......

I am asking for the sake of asking, to find out what can and cannot be accomplished.

I see others are making lots of wildcat cartridges these days, and yet dont make many custom nitro express guns.

I cant see myself ever having such a thing built, but I CERTAINLY wish to understand why nobody has tried.....

Are there any single shot actions it can be built upon? bolt guns?(rimmed issue again)

PS I have the Rigby for pigs......this is merely a 'why hasnt this been done yet' question!

Ben