Depends on how much you shoot. I keep 150 rounds of factory +P+ JHP in 9MM. That is carry/SD/HD/ SHTF ammo.
I try to keep at least 4000-5000 rounds of 9mm FMJ for practice.
5.56, I have 300 rounds of LC M855 Ball in magazines. Several thousand reloads and cheap M193 ball for practice.
I don't shoot my .303s very much, so 500-600 is adequate.
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost