Marrakai,
The last Holland 10 paradox ( .805 vs .835 for an 8 ) was made in 1929 and was one of the last 2 or 3 paradox guns made untill recently. Eventhough the 10 had a nitro load in '29 the ballistics were the same as the 1890's 8 dram black powder load. It would be interesting to know who the gun was made for and where it went off to. I recall reading about one Hollad 8 single that was made for a family that had coffee and sugar holdings and they wanted the gun for protection against DG when checking the crops and used it for that well past the 30's.