Theres the best myth that I ever do about getting the weapon skill meter to full.
(TO HITMAN LEVEL)
It is better to be doing this in doherty under the roof of your garage shop right
behind the blue save disk so the helicopter won't appear and shoot at you.
Start to shoot the cop and 2 wanted level star will
appear and it is better to have the rocket launcher or minigun ready in case when
the swat enforcer truck and/or the fbi rancher start to come.. just keep shooting
on cops with ur choice of weapon till they are on hitman level, then change to
other weapon and keep on till they all are on hitman level.
Longest chase time with 5-6 wanted star level under this roof was 25 min with the
desert eagle gun.