In all the times.I've been inside mine I still don't know lol. But I'm guessing bore is 28mm as this seems common through the larger Diana guns. Stroke- really not too sure on that. I'd be interested to know that one myself as I suspect that whilst it might have been longish compared to similar guns back in the day, I think in modern terms and certainly amongst other current Diana's it is relatively short. Barryg is usually the one good on that information and he's never around where neededOriginally Posted by buttloaves
Dave
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