I'm going to Montana on September 1 to an Outfitter to bowhunt elk. The outfitter recommends fixed broadheads for elk. I have always had great success with 2 mechanical blades such as rage chisel tips, hypos, xtremes, and killzones. He said that the G5 Montecs is what most people use there. Will I be good with the expandables or should I go with a fixed head? What kind, if so? I looked at the shuttle, the tricks and the Montecs. What is the difference? I'm shooting a 70-pound bow with approximately 340-355 Ibo at 27 1/2 "dl and Easton fmj 340s with 50 grain of bronze inserts in the front.