Ah, here we go, Steve Bertram got me up to speed on how to defeat the "new" IMGUR.

20/.577 Alexander Henry hammerless, 25Sep1897, 6 3/4 Dram 570 Grain bullet

Alexander Henry "Best" 10Bore full rifle, 9Apr1894, 2 7/8" brass case & 1048 grain "cannelured bullet"

Holland & Holland 10Bore full rifle, 25 Aug 1881, 3 1/4" case, 14lbs 8oz

Holland & Holland hammerless 10Bore Paradox, June 1898, 2 7/8" case & 875 Grain Paradox bullet, 13lbs 4oz, Nitro Proof for 8Dram/920Grain bullet equivalent.
Of the 89 total Paradox 10Bores made only 37 were hammerless like this example.