I have a black Diamond also. I think the sabots I use actually incorporate a .44 pistol bullet in their design but I could be wrong. About 15 years ago when I first started using sabots the most popular set up were the hornady set up with the green plastic. So that is what I was still using when I first lined up my black diamond. Shot prettty good using 100 grains pyrodex loose and with the pyrodex pellets. I really like the pellets by the way. The problem came when I tried to shoot 150 grains of powder. Which is the maximum they are rated for. They wouldn't group in a 5 gallon bucket at 100 yards. I kept messing around and still could'nt do any better. Getting ready to chaulk it off to the barrel when I tried the thompson center sabot. Look the same but when I shot it twice from a clean gun they were touching. After further examination I found the plastic was a tad thicker and a whole lot stiffer. Great shooting little weapon but a little loud in the woods, metal rods cased cased in a hollow plastic stock requires a little sound proofing. Also the safety is a litttle loud in the woods at close range. Cleaning take a litttle longer than my brother inlaws encore but at half the price.
Mine came with three different primer setups a no. 11, musket cap, and a shotgun primer, The shotgun primer has a spring like coil to hold the primer. You may want to check your state regs to find out the legal details in regards to hunting.
Patrick