Triple Shock's are like any other bullet in the accuracy department. Your rifle will either like them or hate them. Going with the 120 out of a 7MM isn't a bad idea. My Dad kind of does the same thing with his 308. He uses the .30 cal 130 gr. in his 308 to get velocity over 3000 fps. My 280 likes the 140 gr. TSX but not the 160 gr. So, you will have to try them in your particular rifle to find out.