I used the 175 LRX in a 300WM, also going 3100 ( not the fastest I could push it) for 2 reasons...(1) I wanted to see how it opened up with a "behind the shoulder shot", and (2) it shot so well with R23 that I wanted to use for Temp stability. At 100yds ( guesstimate) with a high lung shot, I got quarter sized entrance/exits but lungs really tore up. She ran 30yds downhill and rolled a bit. I have loaded the 165-168 Barnes for others in their 30-06s and 300 WSMs, they are pure poison on deer/elk for them. My last cow elk before this one was way back in 2002, used a Barnes 185 XLC in a 338WM, also around 3100fps. Same results. I will be trying to get to 3100+ with the 150TTSX in a 24" 30-06 and 6.5 Staball. "IF" I could get it there with accuracy, I would be tempted to shoot a cow elk with it. I bet it would "work just fine" at 2900fps too, ha. I know I worry way too much about the "hard angling shots, etc, and I still end up with a broadside, high lung shot opportunity 95% of the time! I must be a better "Hunter" than I give myself credit for, lol