So to those C&R's who think they fly under the ATF radar when they buy a dozen Mosin Nagants in one transaction, keep only the nicest one and sell the rest......ATF knows and keeps records. (so be careful that you don't run the risk of dealing with out an 01FFL)
I would never do such a thing, but how would ATF do this? There is no reporting requirement for multiple rifle sales for FFL to FFL transfers that I have ever heard of, the only record would be in the wholesaler's bound book, which only goes to ATF if the FFL closes.
I suppose an ATF Agent could notice during a regular audit of the distributor, but considering how many guns the bigger shops move, that would be like a needle in a haystack.