I had almost commented on this yesterday, but I was to lazy. The best bbs are BLS, BLS, BLS, & BLS
BLS is the OEM for all the best brands, period. Madbull, Geoff, ASG, Noveritch, and longbow are all made by BLS, just with another name slapped on the label. If you want the best bbs at the lowest cost, order direct from BLS, or buy the cheapest of the brands I mentioned above.
As far as the worst brands, I have only tried Valken (aside from BLS), and I would avoid Valken at all cost
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