Old Rimfire Ammo can loss its puch even if kept in climate control indoors.
I had CCI 22mag solid points fire strong and weak all from the same 50 count box.
they have been inside in AC home for the last 5 years or more.
H450 is my favorite powder for most medium-large capacity cases.
I have reloaded for many years.
I bought a used Ruger #1 243 with this powder and proper bullet lenght I got groups of .25" center to center" @ 100 yards.
I also used the H450 on my Savage 110 E 270 cal and it got sub...
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