Yup, did exactly that, they are sending me a few Scorpion PT Golds and a few red crush ribs to try. I understand that if the black crush rib is too loose and the red is too tight that there is a smooth black sabot in-between the two. The blacks load EXTREMELY easily with a .452 XTP, so I imagine it would be even easier with a .451 Scorpion. Hoping the Red sabot will be just right.