So I like bounty hunting, but I've always used an interdictor to pull wanted ships out of SC or just stalked around nav beacons. I've heard people have a LOT of success around resource acquisition sites but when I gave mining a shot I never saw any NPC's.
Are they really that good?
Protip :
1/ find a belt with an extraction point (to be sure there is miners and pirates in that belt)
2/ hit the belt at 30km/s at least 2000km from the extraction point. Do
not exit supercruise in the extraction point.
3/ stay at the surface of the belt, scan for pirates, kill them.
4/ if there is no pirates anymore (or at all), jump, go to /2. Don't bother to go into the belt and get masslocked.
Player populated area tend to have lower pirate count that remote systems, look for intependant extraction systems i get good results usually. If you find the right belt and the right instance, it feel like a minecraft generator, the second you kill a pirate another one show up.