hey Maxiball- that .600 ball should allow around a .012" patch if the ball is pure. You might even get a .015 to work. The beauty of the smoothies is having a ball/patch that 'just' fits, loads slickern a rifle-gun and kills about anything this side of a cape buff out to 100 yds. I'd also try some .595's if I could find them. That is the size ALL of the guys up here use in their .62 cal. foulers. it allows a sligtly thicker patch than the .600 ball. Since they can now get a Lee mould for a .600, they would parobably use that - much cheaper than the Lyman mould, BUT bigger is not always better, especialy in a smoothbore.
: for the .610., I would try a ctg. after made Post-it pads can be used for the ctg. paper- self-glued makes them easy to use. After made, I'd dip them in melted bullet lube, either comercial BP lube, or 60% beeswax, 40% neetsfoot oil (not compound). Melt in a double boiler, dip the ctg. down to below 1/2 way on the ball. Once cold and hard, it will be OK to handle. This should shoot very accurately, and quite cleanly as well.- Enjoy! hint- spiral-wound ctgs., cone shaped with sharp taper look and handle better than straight tubular ones. When biting off the end, you will have a tiny pour spout for priming, then stuff it into the muzzle, powder down. By the time you get the wiping stick out, the power will have drained downout of the paper ctg. Ram the whole works down, and fire. This is very fast, especially with a short gun. This is how I could load the .69 rifle in 8 seconds. our's shold be faster due to not having to cap, but that might be relative to priming out of the ctg.
: Do have a LOT of fun with that smoothbore.
Daryl
