I'm shooting a CVA Grey Wolf .50 Percussion. The sabot was a 300gr. shockwave. Granted when it comes to sabots I know nothing. I'm not even sure what the bullet caliber is, although I think it is .45. It is an old rifle, made in 1989. I bought it last year for next to nothing after it sat in a gun store for years. Brand new gun 16 years old go figure. BTW it has a 26" barrel.