What grain of 5.56/223 to use?
Again, I'm new to the AR-world. I understand that individual guns tend to "like" certain brands and grains of ammunition. But for those of you who have AR 15s with 16 inch barrels and 1:9 twists rates, what is the best grain/brand of ammo for your rifle?
I am looking to buy some 5.56 in bulk within the next two or three weeks and was wondering what grain is best for a rifle with a 16 inch barrel and 1:9 twist.
Before you say it, I know I will have to sample different types at the range, and I plan on that, but I would like to get a general idea of what to sample.