Well, lessee...500 * .40 hulls works out to 444.4 .45 hulls...nah, I need those. I doubt I have 275 12ga (.729) hulls laying around. Would you take 910 .22 hulls?
If Rex changes his mind, I'd be interested in a cash price. "Equivalent value" in factory .45ACP at current prices is what, half a box? I'd offer a brick of Winchester LP primers, but the last price I saw at a local shop would make them worth more than a new set of Lee carbide dies.
