I'll have to find some load data for that particular AGS bullet before I actually shoot those in either the 45-120 or 45-70....it's got a reeeal long bearing surface, I would expect pressures to be high with any normal 500gr load. And since it's got a tungsten carbide core, it would be much harder than lead as far as compressing, so pressures may be real high....I haven't found any load data for it, even at the Speer web site, I would imagine it's intended for use only in the 458 win mag and bigger DG rifle calibers. And at over $6 each!!! At least the brass is reloadable at $2 each.....heck, those bullets are so hard, they might even be reloadable!!!