If you search on this forum or on Google, you will find plenty of info. Be careful, some people are running some very hot loads with the 168's.

Give us your barrel length and twist and we will go from there.

I can tell you Factory Federal 168 GMM ammo has 42.5 grains of powder. I opened one up just to measure the powder weight.

If you have a Chrono or know someone who does, get around 2,725 fps then try different seating depths. You might try a few different powder loads and step in .3 grn increments.

I am sure you will find a good load for it pretty quick. My 10 twist will bughole the 168 A-Max's