oldgrouser;
While it isn't experience with .277" homogeneous bullets on elk, I have used the 140gr TSX on a first rack whitetail buck and used the 130gr GMX on a 2nd rack mule deer and a mature whitetail buck with excellent results.

For whatever its worth, when I hunt here in southern BC, I'm packing an elk tag, moose tag, whitetail, mule deer and usually a black bear tag as well - just because. Last season I believe I only dragged out my .308Norma for a couple of hunts and spent the rest of the time with a parts gun .270.

Now if I could only run across a legal 6 point elk or a legal spike bull moose.... frown

Hopefully that was some use to you and good luck with your elk draw.

Regards,
Dwayne

The most important stuff in life isn't "stuff"