Reloading .308 Ammo for Half (or less) Factory Ammo Cost

I did some math and here is how much money you could save by reloading:
Cost for me to reload (with free 150 gr SP bullets from rebate): $0.28/round
Cost to reload 150 grain SP: $0.69/round
Cost to buy Hornady Whitetail (150 gr SP): $1.40

There are slight differences depending what powder, primer, and bullets you choose, but I also estimated $0.60/round for 150 gr FMJ, and $0.71/round for 150 gr SST. That's pretty good considering Hornady Black 168 gr FMJ is $1.70/round, and Hornady Superformance 150 gr SST is $1.95/round. This means you can reload for approximately 35% of the cost of buying factory ammo.