Completely unnecessary. Keep the ammo dry and cool and it will last longer than you. Back in the late 70's and early 80's we "found" a few crates of .303 British ammo that had stenciled on the sides of the boxes "Not For Use In Syncronized Machineguns After 1928".
The ammo was over 50 years old when we shot it and although we did have the odd FTF, it wasn't much worse than ammo that was only 10 years old.
My father is still using H4831 that he bought from Bruce Hodgdon in 1962 or '63 (he bought 100 lbs when he bought his then-brand-new 7mm RemMag).
"Those who have long enjoyed privileges as we enjoy, forget, in time, that men have died to win them."
Franklin D. Roosvelt