Recently i've been trying to use claymores but I never seem to be able to position them in a way that makes them effective. I'm aware that you can avoid them by crouching or going prone but in the situations where i've used them, the other team seems to just freely walk into them without triggering them. There was one instance where one was planted several feet from the sliding door inside the Metro near the Cafe entrance and someone actually scaled over it like it was a fence?
If I want to protect a doorway, how many approx feet in distance should the claymore be placed to effectively cover any attempt to enter the doorway?