Nice safe
I'm afraid I'd need a bigger one.
Without doing an inventory count, I have 15 or so 50 cal ammo boxes, and other 8 30 cal. I've discovered that if I want to keep stuff in the boxes, I don't have enough to store everything

.
I've got 9mm, .45 acp, .32 acp, 9x18 Makarov, in handgun. For some reason I have about 100 rds of .40 S&W (half are JHP), a box of .38 Special and a box of .38 S&W, and I don't have anything in them.
Then for rifles, I have .223/5.56, 7.62x39, 7.62x51/.308 (for my semiautos), and 7.62x54R, 7.65x53 Argentine, and 8mm Mauser for bolt. Have 30-30 for the Winchester lever gun.
A goodly few bricks of 22lr, and then a good amount of 12 gauge. That includes a case each of the Challenger Mini's in both target/birdshot, and in slugs, from when Brownell's was clearing them out (they run great in my Shockwave).