I have never used the 150 in a 300 mag, usually it was the 180 XBT, and that was 20 yrs ago! I have a friend in Texas who just got a Sendero 700 in 300WM and he asked me about the 150 TTSX ( or any mono) for a combination deer and elk bullet? he doesn't like recoil as he mostly bow hunts. He is not a long range hunter either, figure 400yds would be an extreme shot for him ( as it is for me too!) Anyhow, as a combo deer/cow elk ( he won't be packing that sendero for big bulls, he and his brother are like me, hayfields are a dream! Any opinions welcome.