I started with Antler King mineral supplement in a bag. Just poured it on the ground in a pile, came back a few weeks later and it was gone, along with all the dirt that was underneath the pile. The deer dug a crater. I bought another bag, put it in the same hole, and it lasted a couple of months. Seems the deer like to lick the dirt as much as the mineral. I compared ingrediants between Antler King and regular livestock mineral. The only big difference that I could see was the amount of copper was less in the livestock mix. There was a warning on Antler King not to feed it to sheep. I put a fresh pile out again this spring but it hasn't been hit nearly as hard as in the past years. Could be due to the heavy hunting pressure around my place last fall, as well as the high traffic counts in front of my house.
Anyway, I have found bags or "loose" minerals work well and they like cheaper livestock mineral as well as the very expensive Antler King. I don't have any way of gauging whhich is more benefical for deer/antler growth, special mixes or the cheaper livestock minerals. I literally have a 3X3 crater where they dig it out of the soil.
FWIW
The 'Bonker