Just to repeat the above, ammo is darn resilient.
I keep my supply in a handful of dry boxes and store it in my cool, dry laundry room. I also live in an arid climate. I don't ever expect to be time pressed to shoot any of it.
Beretta PX4; 92FS; 92S; 8040G | Rock Island GI 1911 | Sig Sauer SP2022; P6 | Colt Python 4"; 1968 Detective Special 2"| Smith & Wesson M642 No-Lock | Ruger LCP; 10/22 | Daniel Defense M4V1 | Remington 870 | Alpine M1 Carbine | Steyr M1895 |1943 Izhevsk Mosin M91/30 | Walther PPS