you want a 1 lb pocket 9mm, and some sort of autoloading rifle. If you use your pistol much at all, you wont make it. So a couple of magazines of ammo for it is plenty. There will be no practicing once shtf, cause the noise will call in your killers. The pistol is so inferior to the rifle that you'd better need it very little at all. Stealth, knowledge, skill and focus had better be what you use, not lots of rifle ammo! If your rifle and ammo are too heavy/bulky to be slung at the ready, then you need to swap to some other gear.