Winchester .45ACP ball for 26.5/round after rebate:

Rebate Form:

https://www.luckygunner.com/winchester-pistol-ammo-rebate-spring-2018

Ammo:

https://www.luckygunner.com/45-acp-230-gr-fmj-winchester-service-grade-500-rounds#rid=AmmoSeek

Computation for 500 rounds:

$ 150.00 Cost of ammo
25% Max % on Rebate
$ 37.50 Rebate amount
$ 112.50 Total Cost after Rebate
15.49 Shipping
$ 127.99 Total after rebate with Shipping
500 # of Rounds
$ 0.2560 Cost Per round delivered