Interesting finding. Both loads were shot from my .45 GM/LRH Renegade.

The two different sabots loaded about the same. I could not push either one flush with the muzzle with my thumb. Both required a firm push with the short starter to seat flush with the muzzle, then a firm (but not difficult) push with the ramrod to seat on the charge. The bore was swabbed with both sides of one alcohol patch between shots.

I assume the velocity differences are a result of the different polymers used by the manufacturers.