Originally Posted by gjd139
Tussell and anyone else having problems:
Here is a quick diagram of where to go on Hard and Insane modes so Magruder CAN'T hit you. When he shoots it will still be indicated as a white line but not a red (hit) direction line. There are some long boulders on both sides, go to the right and on the boulder marked in the picture go between the two rises closest to Magruder on that long boulder. May sound confusing but you can take your time and get easy head shots without Magruder coming anywhere near hitting you.
Hit him with your rifle, he throws the dynamite just quick draw to it and welcome some nice achievement points into your account.
Thank you so much. It's so easy with your description.