Well, for Bug-In, I've got lead in different flavors:
12 GA
16 GA
20 GA
.410
.30-30
7.62X54R
9mm
.22LR
For Bugout it'd be:
12GA, 9mm, & .22LR
Just not much use IMO for lugging around the Mosin. The 12 can bring down game at need and ammo's easier to scrounge. With 9mm and .22 I can feed the Beretta 92F, the HK P2000, the Kel-Tec Sub2K, the 995, the Henry .22 L/A, the .22 revolver, the Walther P22, and the 10/22. 8 guns (4 handgun/rifle pairs) to equip 4 people and only two calibers to worry about, easily available for scrounging.
-'bridge