Learned a little something the hard way about BHN after casting a bunch of clip-on wheel weight boolits from a couple of Lee moulds, 9mm and .45 ACP. Water dropped them from the moulds then powder coated them, then dropped them into water again after coming out of the convection oven from the heat/cure process of the PC. I tried sizing a few of both calibers right away … they were barely cool and towel-dried when I sized them easily with my Star lubesizer. Was away for several days and decided I would finish the sizing and had to stand on that Star to get the .45ACPs sized. Even the 9mms were a little tough to size. Coating was cured nicely and survived the smash tests but those boolits got really hard after a few days. I'm now thinking a 50/50 mixture of clip on/stick on wheelweight plus some tin for fill out might be the most economical and practical way to go. Apparently at handgun velocities the boolits don't need to be that hard. Rifle boolits I'd think would be another matter. Big Boomer