Originally Posted By: Caller-4-Hirewith a 1 and 9 twist what should be a good load to start with on this gun.
Do you hand load? If so, I have good luck in all my AR's in .223 with 60 grain Hornady V-max bullets and Benchmark powder. All of my loads are at or slightly above maximum but of course you'll start a bit lower and watch for pressure signs.
If you're looking for a factory round, try picking up a box of Hornady 55 grain v-max rounds to run through your gun. Generally, these are a great go-to round for accuracy and for hunting. I'm just speaking on my own experience here with multiple AR's (some DPMS).