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Pardon my ignorance, but what exactly is the advantage of having an aluminum or graphite powder on your BB? Just for sniper 'marking' or does the powder act like a solid lubricant in the barrel? Or for the weight, which'd make no sense to me seeing as these are .30s or .36s and they make much heavier weight BBs without any additives.
All I can foresee from the powder is a dirty barrel and hop-up.
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