With regards to the ATF Question of the month posted here:http://www.atf.gov/firearms/industry/
The law in question was never intended to be applied to rifle ammunition that is adapted to "handgun" use later.
Further, said ammunition is not a problem in the real world with regards to officer safety; this is a purely speculative move on the presumption that someone, somewhere, someday MIGHT use such ammunition unlawfully.
Literally attempting to fix something that is not broken by breaking it.
Bet it has zero effect on what they do, but we have to try.