Welcome from AZ !
I started off with a similar DPMS LR308. Great gun it should eat pretty much any ammo. 150gr to 168gr works best. Try to stay away from the steel case stuff but it will work. Do the break in with Mobile1 or CastroGTX and run it wet.... Really wet !! Clean the barrel with patches every couple rounds through 20. Have fun and ask questions when you have issues.