Pony Express, the hall round does feel a bit lighter at the muzzle. The standard pistol weighs 2.7 lbs. and the half round weighs 2.6 lbs. so not much difference really. Both are 54 calibre with belt hooks.
Tsalagidave, I shoot 30 grains of 2fg with pillow ticking on a .535" ball. From sand bags it shoots to point of aim at 25 yards near as well as my rifle off hand. Off hand I'm happy shooting tin cans at half that distance. The half round gun as best I have seen shots as well but I only get to shoot against it. Silly me I gave it to a friend and he only lent it to me for the picture. We did have a plinking match once and were shooting at a brick at 165 yards. I hit it on the second shot and he never did, of course I put mine away and wouldn't shoot any more!