really easy, well, to find... not destroy ^^
Just head to one of the system the target has been spotted... (mission task).... fly in supercruise at LOWEST speed, get straight into the appearing USS, check out 3-4 uss max, jump to next system.... but.... the 2x 128k hunt&kill mission I got, I went into first system: first USS a guy came up and gave me a mission update: target seen in xyz.... I jumped to XYZ, then supercruised at low speed, USS, jumped in, here he was.... bad news: ANACONDA! Finished only 1 of 3 of 'em... and the 1 luckily security vessels jumped in when I brought the anaconda down do 60% hull.... w/o the help i'd been wiped out!
GL commander