Thompson/Center Arms announced its new entry-level IMPACT!SB line of .50-caliber break-open muzzleloaders, featuring a hand-removable triple-lead-thread breech plug and a Power Rod aluminum ramrod ...

During the nearly 50 years that Thompson/Center has been in the muzzleloading ... before settling on one built around Swift .452-cal. 300-gr. A-Frame bullets in MMP HPH/24 .50-cal.