I tried the Hornady 0 buck (.320") and they were too hard in alloy for my .32. On the other hand, I purchased a Lee DC .319"RB mould which cast
.320" x .320" in my X-ray room sheeting lead. These loaded easily.
Last week, I was shooting .360" pure lead balls in my .36 Rice barrel as a test. A bare ball will just barely sit on top of the muzzle, so this Rice barrel has a slightly
tight bore. These balls loaded just as easily as the .350's, with the same .020" patches. I had one of the shooters in our group seat one and she remarked how easily
the patched ball went down. I was using Mr.Flintlock's lube that day.(Squirrel Match @ Hefley Crk.)