I have had no difficulties with the Sierra Game King shot out of my 7 mm mag. I must admit, I am not using max. loads and perhaps that is why I've had success. I've tried the more expensive bullets such as the NP and the Barnes X. (I'll pick up the NP's if they are on sale but I don't believe that the Barnes are worth the extra cost). I am not a compitition shooter, simply a hunter and for that application the SGK's get the job done.