For the last couple of weeks, I've almost exclusively been playing Scout shotgun-builds, because of the immediate access to INT and easy radar-shooting. Eventually, of course, this build is not going to cut the mustard achievement-wise. Assuming the differences in tactics for pistol or chainfire weapons are negligible due to the same line of fire, how do I go about radar-shooting effectively with these weapons, especially in wide open areas? Do you just take for granted that you require about 5 scan-shots for what the shotgun does in 1?