Other mistake: Dredd tells Judge Hershey that lethal range for bullets is 300 meters "you're safe" straight after people were being shot and wounded on the ground at that distance.
Suggested correction: Wounded, but not dead. He says they aren't lethal, he doesn't say they can't hit you though. His logic is that they can't be killed by the bullets so therefore they are safe.
Presumably the Judges also have body armour which will protect from extreme range and hence lower power bullets, which civilians wouldn't have.
This. That statement about how it would be lethal even though they're 300 meters away always bugged me (on multiple sites), of course it might be injurious or even lethal to civilians, but I'd expect that Judges would wear armor that would protect them.
They were shot dead, extremely obviously. Huge holes in the stomach.