Hey folks,
I'll tag on to Sam with a few more factors. Do you buy your cast bullets ready made, or do you cast them yourself? How about cast bullets with gaschecks? Besides bullets in quantity, what about quantity for other consumables such as powder, primers, shot, and wads? The bigger the quantity you buy of those things, the cheaper your cost per round gets.
If you figure the cost of all the reloading equipment that I (and most other folks) have, one could certainly make the argument that buying commercial ammo would be less expensive. But then again, that is commercial ammo, and I consider the ammo I make to be better. I can also make a much bigger variety than I can buy. And I am not the best reloader around even though I have been doing it since the 1960s. I know some folks who go to some really Herculean efforts just to reduce the standard deviation of their loads by a very small amount. Those guys are more particular than I, but I am more particular than the folks who make factory ammo. It all depends on how far you want to go with the quest.
I can buy surplus ammo for less than I can make it, but that does not mean I should not make my own. Actually, I really do not like to use surplus ammo because of the unknowns of its corrosiveness. I am not saying anyone should not shoot surplus ammo. For my own purposes, however, I would rather shoot my own. I do, however, make good use of surplus powder and surplus bullets whenever I can.
Best wishes,
Dave Wile