You using youth size and full size basketballs? What’ll be the next ball for the big one?
I'm using Mikasa BX series basketballs off eBay.
30lb is BX 1010 - 28.5" circumference or size 6
26lb is BX 1008 - 27.5" circumference or size 5
22lb is BX 1006 -25.5" circumference or size 4
The small one is a kid's ball, not sure of the size. It weighs 13lbs, I gave it to my son. It would be good for one hand swings for me.
Next build will be:
BX 1000 - 29.5" circumference (size 7).. It will yield 34-35 lbs actual I believe.
Before building the maces I calculated weight of each one, due to displacement from the handle and flattening of the bottom they ended up lighter than my calculations, I knew this would be the case but was not sure exactly how it was going to translate in the field. What I listed above are the actual weights versus calculated weight, on average the actual weight is three or four pounds lighter IIRC.
The next heavy one after that will contain chopped up pieces of rebar to add extra weight, using steel shot in the mix they can get pretty heavy, for now rebar will be cheap and easy.
Bamboo handles are feather light and most all weight is in the mace head, I'm very happy with these and have put lots of 'miles' on them.