Barnes tmz using the yellow sabot that comes with these are extremely tight to get down the bore - Barnes Spit-Fire T Muzzleloader Bullets .50 Caliber .451 Diameter 250 Grain 15 per Box 45172

Being these are a Boattail Projectile not sure these will work with a non Boattail Sabot they are Hard to push down the Bore of a Knight 50 Cal Rifle not impossible but extremely hard. Might need to find a different Boattail Sabot? Barnes TEZ might be a better Option.