OK, dumb question here probably...I have 3 20 round boxes of Federal Personal Defense Hydra Shok JHP 165 Grain PD45HS3 that I had purchased years ago at my local Wal-Mart on sale for $7 a box. Is this the correct ammo for my new Kimber 45 ACP? Is 45 auto and 45ACP interchangeable lingo for the same round? Was going to buy some ammo and remembered I had these. Obviously need to buy more ammo, 60 rounds won't last long!