@Sarg A google search didn't show any for sale. I also checked gunbroker and gunsinternational.
Id consider them if I could find some
It seems most are out of stock, I’ll PM/DM a couple of ideas to you on this.
You certainly have that dialed in, we have had a few guys using 8bore & even 4bore on Buffalo & cull hunts, I wish now I had taken note of their loads but the big 8 wasn’t as tremendous as I thought it was going to be, the 4 was & shit near shot out both ends on impact.
Haven’t used mine on DG as logistics & expense has been a factor.
Shot plenty of birds with the couple of 8ga shotguns I have.
My buddy just sleeved one of his singles to .577 3in LN & I was thinking of doing a rifle on one as a single is easier but I have two .835 barrels !
Looks like Winchester & Remington are still doing them, they used to sell primed hulls, the modern ones are much easier, just need to swag the belt down, the old ones had a extra belt.
One silly old F#%ker modified HIS chambers in his lovely old bore rifle, now that was a disaster on two points, one wrecked fine old rifle & some idiot (or another idiot) May chamber & fire one of the mega loaded Kiln Gun cartridges !!