Ahhh, I didn't think of that. They are .45 cal near as I can tell. They are the same diameter as the shockwaves at least, but neither package says anything other than that they are for .50 cal muzzle loaders.
Anyway I just got back from the range and the shockwaves shot much better. At 50 yards I got one ragged hole, half inch group. At 100 yards it opened up to 1 3/4 inch, two holes touching and one that snuck out there a little bit. I suspect that has more to do with me than the gun though. I was using 100g loads of both T 7 pellets and Pyro pellets. The pyro shot a little better.
I've noticed that in my gun at least the tighter fitting sabots tend to give me better groups.
Has anyone out there used the shockwaves on deer? How'd they perform?