One of my favorite portayals in recent history of the Colt firearm was Jeff Daniels in 'Gettysburg' atop Little Round Top, shooting his 1860 Army .44. Although it is likely not historically correct (there is still raging debate among scholars and historians as to whether officers actually carried extra cylinders during the Civil War) or technically correct (in the heat of battle, it was not likely that an officer would have the time, nor care, to have a cylinder topped off with what appears to be Crisco at 05:40 in Part 2) the scene of Daniels (Chamberlain) reloading and seating the barrel on a log over the freshly-loaded cylinder is soul-stirring to any BP enthusiast. I give very, very high marks to this flick despite the horrendous whiskers.
Can't say for certain what his brother is shooting, but it appears to be an 1851 Navy.
PART 1
PART 2
PART 3
PART 4 (different poster-lower quality. Why? I don't know.....)