Donniedee
I have a 700 PSS, 26" barrel; both 168 and 175 gr work great and, as Jethro3898 mentioned, the Fed GMM are GTG.
I always had good results with the 168 up to around 700/800 yards. I switched from the 168 to the 175 when I started to stretch the .308, as the 175 gave me better results passed 800 yards, the extra weight makes a difference. Nevertheless, try different ammo, as your rifle may like something else better.
If you reload, you may be spending some quality time figuring out your next load, plenty of good stuff out there, just don't get too fancy to start with. In addition, except if you have a "special connection", be ready for searching for ammo, or reloading components, as they are not as available as few months ago.
Have fun and let us know of your results.
Good shooting.
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