9mm (defense and competition)
.38 Super (defense)
.22 LR (practice)
.223/5.56 (hunting, defense and competition)
.243 Win (hunting)
.270 WSM (hunting)
.308 Win (hunting and long range target shooting)
.30-06 Springfield (target shooting)
.30-30 (hunting)
20 ga (hunting)
12 ga (hunting, defense, competition)
I do have guns for other calibers, but I always keep some of the above on hand. I hand load for each of my hunting rifles, but sometimes I am invited on a hunt and don't have time to crank out any rounds prior to going (being a college student limits my free time). For this reason I always keep some in stock.
In addition to the above, I also currently have some .303 Brit, .444 Marlin, .38 Spl, .357 mag, and .44 mag in the ammo locker.
And I don't even have a .357 or .44 mag