Hi Kmkekic24, welcome to LongRangeHunting.com.
You've got a great rifle and caliber to start with.
Are you going to be reloading?
If so, try the 110gr Hornady Vmax for varmints. It will flip groundhogs end over end when hit just right.
I use the 175gr Sierra Matchking for targets and groundhogs too.
Varget powder, Winchester brass and Winchester WLR primers get used for all of those bullets in my 308win.
If you aren't reloading you might want to try the Hornady 168gr Amax factory load.
There is also this factory load:
MidwayUSA - Hornady TAP Personal Defense Ammunition 308 Winchester 110 Grain Polymer Tip Point Box of 20
I googled that Prvi Partizan ammo and some folks felt it didn't shoot well. You just have to try it.