Re: Need info on this black powder cartridge...
Need a better close up picture , At first I thought they were 16 ga paper shotgun hulls. But when I blew the photo up, i saw that what appeared to be a base was actually a hollow base bullet. There were thousands of 69 caliber muskets, both US and foreign used in the WBTS. Usually the paper wrapped cartridges looked more like home rolled roaches than those fancy cardboard tubes. Are they still loaded? I can't tell if those tubes are sealed on the end away from the bullet. There was an early french 69 caliber breech loader, but I don't know if it ever was made for paper cartridges. Similar to the Zulu shotguns sold mail order here 100 years ago. They were mostly 12 ga. IIRC correctly the original french musket may have been converted to a breech loader briefly. Those cartridges are too substantial to be combustible like the percussion sharps cartridges.
Canadian militia units used a similar looking 58 cal cartridge in their Snider Enfield rifles. But that was basically a 24 ga shot shell with a 500 grain bullet and they were rifles.
Need some close up pics.