The OP's question as I recall was for round balls. Not can I shoot them farther or anything like that. Thumbcocker got it right, they don't go so far. From my back porch I can shoot stuff out of trees with 'em and not worry about them traveling to the nearest farmhouse. I use .311's in a 30-30 or a Krag with 3.1 gr. of Bullseye. Balls are lubed with J-wax or whatever and a dab or FWFL around the mouth of the case after loading. Obviously there's a lot of variation in velocity depending on orientation of the powder. Shooting into trees for starlings, house sparrows and such pretty much gets the powder back. Just remember to elevate the muzzle prior to shooting and it'll work OK. If the rifle was/is sighted for it, I can headshoot sparrows at 50' or so with 'em.
A little humor (and data) regarding round balls:
http://castboolits.gunloads.com/show...-Krack-s-Balls