Great video.
I purchased a Whitworth (Pedersoli replica) a couple years ago and last year managed to find a hexagonal helix bullet mold for it. The rifle is nearly as accurate as some of today's mass produced firearms. Not bad for a muzzle stuffer designed and first produced in the mid 1800's.
-Of note, Queen Victoria opened the first NRA match in England in 1860 by firing a Whitworth rifle at 400 yds. Her shot was 1.5" off the V-Bull.
Sorry, I don't mean to be a Cliff Claven, but I just find it really cool.