I would avoid them. While I haven't seen anything with the 135, a couple of my friends, a buddy and his wife, came out hunting pronghorn with me using the 153 (as well as a .223 for one goat) going around 2940 I believe.
I use the 156 EOL in my .260 AI with Reloder 26, going about 2940 fps with a 29" barrel, and they seem to work well after a load of pronghorn from 200 to 600 or so yards, a couple deer at 560 and 940 yards, and two elk at 840 and 860 yards. If you plan on shooting closer ranges for elk, I personally would take a look at the Hammer bullets, Badlands bullets, or possibly a nosler accubond. The Bergers seem to do best for me past about 400 yards. Inside that, they have killed really well for me on smaller animals like pronghorn, but they can be explosive if significant bone is hit. The closest I have used a Berger on a mule deer or an elk is 560 yards.