I have used the SuperPerformance GMX 150 in 30-06, as well as the 150 SST SP, and Remington's 150 Corelokts in my heavy barreled Mauser 98 for the last several years.i. The SST and GMX run 3-shot, inch groups, at 300 yards, the Corelokts just slightly larger. Federal 180s(Powershok??) do the same, tho I don't recall offhand where they print in relation to the above mentioned. It seems this rifle just isn't real picky.......
. Probably shoots even NP as well....
At 300 yards the SST loads shoot about 6 inches higher and 4 inches right of the Corelokts, and the GMX about the same from the SSTs.
I have not used the SP loads in any other rifle. I have found no advantage to using GMX vs SST at over 300 yards on caribou. Inside 300 yards, they seem to do a bit less damage than SST, which can create LARGE wounds, especially if hitting bone or large muscle mass. Inside 300 yards, I see no advantage to using either of the SP loads in preference to the Corelokts.
These are all factory loads. I have not hand loaded for this rifle. Pretty sure i can't do better than that for accuracy over the factory fodder! Even if I had better eyesight.....
My experience with Barnes TSX factory loads in .260 and .243 indicates I will probably never buy another box of same in any caliber. Not when those groups are 4 moa and much cheaper Corelokts do moa in those two rifles. Outrageously priced with inferior accuracy just doesn't float my stick.
Might try some TTSX in hand loads when I get back to it. Probably not. All copper bullets (expensive!) just don't excite me much when C&C have proven to do all I require of them with less copper fouling.
