These are things that might simply fly under the radar for the average citizen and have little negative political impact.
That's where those of us in the gun culture come in. Back in 2007, OSHA proposed Standard 1910.109, which would have lumped "small arms ammunition, small arms ammunition primers, [and] smokeless propellant" in with high explosives, causing all sorts of logistical nightmares. The NSSF and NRA got involved, Congressmen were contacted, and OSHA quickly backtracked, claiming that it was a misunderstanding.
That's how we keep the sneaky backdoor stuff from going through. There's always a way to apply pressure, we just have to stay informed and active.
gc70: thanks for a more concise explanation than I could muster.