I've getting wound up on this, a bit. I think I need one with an 18" bl., 4 bore, of course - that would be 1.052", give or take a few thousandths. A 5 gauge ball, at .977" would weigh 1,400gr. 1,750gr. for a full 4 bore ball, so about 1,675gr. for a 1.00" ball - or thereabouts - hard or soft, no matter.