A comment posted to the youtube video from Mr SM 1 gave a really easy way to get this achievement. Managed first time with this method.
Comment posted by YouTube user Pfletch83
"I got this achievement earlier in the same level,after you get out of the first section of mineshafts and first reach the building grab the first shotgun you see,and go into the facehugger room (make sure you leave your light on to better see the mobile facehugger) wait until? the two face huggers (one will be attached to the marine on the floor) are lined up and use both barrels of the shotgun."