The 1861 Colt Navy incorporated the design and production changes of the 1860 Army to the Navy Caliber. Production ran from 1861-73 with about 38,000 being made. About one hundred were made with fluetted cylinders. At a glance, it is hard to tell it from the .44 army model but the cylinder is smaller in diameter and not rebated. Famous recipients of dressed up '61s include Horace Greeley and Phil Sheridan.
This one is a Uberti with BU marking indicating that it was made in 2004. It arrived with a rough action that completely smoothed out after about 50 rounds of fire and a number of dry functions. The trigger is a couple of ounces under 3 pounds and indexing is perfect with the bolt dropping near the beginning of the lead. I opened the hammer notch for greater visibility but no other sighing was necessary as it hit right on at 50 feet. I put a leather pad under the main spring- not necessary but I believe it will help spring life as it reduces the tension.
http://www.gunpix.com/gallery/Muzzleloaders_and_Blackpowder/18613.jpg
The locator pins at the bottom front of the frame were prone to fall out so, I staked them in. I also notice that there is no b/c gap and that one chamber mouth is a bit large than the others. It will allow partial thumb seating of a .375 ball but seems to get smaller as the ball is compressed. This made no difference either in accuracy or over the chronograph *
Loads were clocked as follows- 6 rounds each 85 gr ball:
22 Grain spout of pyrodex P 1046 fps extreme spread 36
22 Grains Goex FFFG 966 fps extreme spread 65
* 25 Grains Goex FFFG 915 fps extreme spread 119
* The looser chamber would not grip the ball with a full chamber of 25 gr.FFFG. Velocities were lower across the board than with the 22 Grain Spout. Something about the extra compression made better use of the powder or more firmly gripped the ball even in the correctly sized chambers.
With the shoulder stock mounted, the rig hit about 4" under point of aim. When I figured out the right amount of sight to hold up I did this:
http://www.gunpix.com/gallery/Muzzleloaders_and_Blackpowder/61navystocktarg.jpg
And managed to hit five of six cans from 25 yards. I also hit five of six with the stock removed and shooting two -handed.
www.gunpix.com/gallery/Muzzleloaders_and_Blackpowder/61navyfiveofsix.jpg
This one had more problems ( particularly the odd-sized chamber) than any of the other full-sized Ubertis of recent manufacture that I have shot. Nevertheless, all of the glitches were easily repaired or turned out to be inconsequential to function and accuracy.