Is there a Federal law on maximum muzzle velocity for privately-owned firearms? Could a private citizen employ a discarding sabot or other technique? - Quora
Sabot (firearms) - Wikipedia
Remington Premier Expander Muzzleloading Bullets 50 Cal 250 Grain 24PK
Sabot (firearms) - Wikipedia
Special-Report-Sabot-Failure-2 - NORTH AMERICAN MUZZLELOADER HUNTING
Special-Report-Sabot-Failure-2 - NORTH AMERICAN MUZZLELOADER HUNTING
Accelerator Type Sabots for .30 Caliber Cartridges (100)