The G5 Montec is going to be hard to beat for bone crushing penetration. They are about the most indestructable broadhead out there, and offer very superior penetration. Having said that, however, there are certain bones in a big game animal's body that no arrow is going to defeat. The ball/socket joint of an elk's shoulder will stop any arrow cold. Even from a 100 lb bow. The KE is still about in the same class as a .22 Magnum Rimfire. The idea is not to shoot at big bones, and wait for the broadside or quartering away shot where the biggest bone you will have to deal with is a rib.

I would also say that, at least in theory, a heavier broadhead is going to punch through tough stuff better than a lighter head. Many times the heavier head is wider, though - and may actually penetrate less than a narrower lighter head. Case in point . . . the 75 grain Muzzy.

There is obviously a FOC issue to consider as well . . . and considerations like what head weight is ideal for the rated spine of the arrow. Some folks are using very stiff arrows and gluing brass inserts in behind the regular arrow insert to beef up the FOC and increase penetration.

But most folks out here in elk country are shooting 100 grain heads, andmedium weightcarbon or aluminum/carbon arrows. And paying close attention to shot placement.