Good points. The original powder usrd in .303 and .308 loads was likely AR2201. This has a rather short shelf life especially if it is stored in hot conditions. In some old .303 CAC loads I have broken down the powder had clumped and needed digging out plus there was corrosion on the inside of the case and the base of the projectile. Some of the primers were dead as well.
Regards Grandpamac.
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