Mythbusters - Season 7 Episode 6 -

Jamie and Adam are literally in the soup as they try to determine if they swim faster in syrup than plain cold water. Kari, Tory and Grant try to repeat MacGyver's feat and break a lock with the gunpowder from six bullets and then substantially larger charges. Then they test Davy Crockett's claim that he could hit two targets by firing a bullet at an ax blade to split it in two.