The Hill reports that the wacko who jumped the fence at the White House had 800 rounds (!!!1!!111!!!) of ammunition in his car.
It was in his car and not on his person. He didn’t have a firearm either.
If it were the sort of rifle ammo I schlepped around Viet Nam, 800 rounds would weigh about 25 pounds. Personally, I never carried more than 500 rounds (twenty-five 20-round magazines) at a time, and that required using a couple of extra bandoliers.