Wrong sabots my friend. These are the ones you need. https://www.muzzle-loaders.com/bulle...al-h15045.html My daughter just got that TC Impact and she uses these with both the .452 240 grain TC Cheap Shots and the .458 Lehigh CF 220gr in the same sabot. The .458 loads a little tight but not too awful bad but the .452's load nice and firm but not hard at all.