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If I find ammo from online dealers, do they usually sell to FFL's in Massachusetts?
I'm guessing the FFL would still charge you a fee. Probably wouldn't make it worth it after that.
My thought too. Is it some obscure/rare ammo you are looking for?
Yes, probably the cheap kind, which it wouldn't be after the FFL charged a fee.
Tip: Some online dealers will ship ammo to you if you have a C&R license.