I have an 8 gauge SxS buy W. Parkhurst. The barrels are laminated (Damascus). That aside, I plan to shoot it a little with modest black powder loads. After 24 hours of google searches, I dont find much for components.

I do see some industrial cases maybe available someplace. where? I cannot find new industrial 8 ga cases. If I could get a box, then I need to try and size off the belt. Anyone done that? The ideal would be brass, priced along the lines of what I can easily find in 10 Ga. Maybe 2x would be reasonable, not 10x custom machine shop brass. Although, if I had a drawing, I might try and DIY some cases.

I located wads at track of the wolf for a muzzle loading 8bore. Are these the right size for loading in shells or do I need to go a little larger?

https://www.trackofthewolf.com/Search.aspx?search=8%20gauge

Any suggestions on what might constitute a modest proof test as a percentage of the working load? I did not research loads yet. I was planning on 2 7/8 10 ga black powder load. That would be a max for me. Easy on me and the gun. And proof with a full (or normal) 8ga load. Comments?