What I mean is I used to shoot a lot of different calibers (22-250, 7.62x56 and 7.62 x 39, . 32, .40, .17, 16 gauge, 8mm, etc).
The space in the safe was getting less and less and I grabbed the wrong rounds one day and had to buy some at the range. Got .40 cal instead of .45.
So now I have only 12g, .308, 5.56, 9mm and .45. and a .22.
This has made is much easier to grab a box and go, and free'd up some room and was easy to get ammo at the local sporting goods store and Walmart.
Have you shrunken your collection if different guns and calibers?