I was unaware of a "Leadheads" brand of bullet; for info, the site is
http://www.proshootpro.com
I first encountered the tern "head" many years ago when, as a newbie clerk in a gun shop, I was asked by an old timer for "dirty calbur boolits"; I pulled out some boxes, Speer, Sierra of several weights. The customer rolled his eyes at my ignorance, and told me, "Dems ain't boolits, dems heads, I need boolits!
Realizing then that he wanted cartridges, I asked which "dirty" caliber he needed. His reply was classic: "Hell, I dunno, if'n I'd knew, I wooden ask you!"
After some further discussion, we agreed that he wanted "dirty-dirty" boolits for his "loop gun." Another successful sale!
Jim