Ask the person who sold the ammo to the perp who shot up LasVegas a while back.
Oh, that’s right, you can’t. He’s in a federal prison. He had been previously warned by ATF as he was selling reloaded 5.56 at gun shows.
I was a class 6 manufacturer back in the early’80’s before the McClure-Volkmer bill allowed mail order sale of reloading components to non licensed persons (only ffl holders could ship or receive powder, primers, or bulk bullets.... reason I got into casting...).
I had ffl license, business license, and liability insurance. Insurance was 1,500/yr for $1,000,000 policy. Before first round sold!
After I could buy powder/primers/bullets from distributors w/o license I gave it up. I was selling 500,000rds a year mostly to local PD’s and LEO’s. .38spl. After 9mm craze started, everybody wanted jacketed bullets and could buy factory bulk for less than I could reload it.
Then, the Clintons raised the cost of license renewal to $500/yr just as my license was set to renew (had been $60/3yr).
Not worth the hassle or risk.