BrandonMan

So I seem to find myself blowing a lot of easy kills when I'm trying to hold down a corner or door. I'll place myself at an angle to a corner/door with my crosshair at head level, and it seems that 9/10 times people are able to come around the corner and wreck me. I've tried having my crosshair posted almost on the wall, as well as having it a small ways away, but neither seem very effective.

If anyone has any tips that would be great.