I've a .725" ball mould from Jeff Tammer. It's the largest ball and mould in the picture. I use the wire strippers with the little cuttouts, to snip off the sprue, then a single swipe with a rasp makes the ball perfectly smooth so there's no sprue, as in the other two balls, a .684" left, and .715" in the centre.
: The .725" makes 575gr. in WW metal. I don't cast the large ones in pure lead due to needing the pure for my muzzleloaders. Afterall, a .7" ball needs no expansion and a straight WW ball doesn't. They'll mark a bit, but that's about it.