So I have a Wilson combat 308 on order. I went with the 14.7" barrel, but now I'm thinking of changing it to a 16" or more. What kinda accuracy can I see shooting 100-300 with this short of a barrel. I didn't think much about it, but I've come across threads where most AR10s have 20" or more barrels so I hope I didn't make the wrong choice of barrel length. I honestly don't plan to shoot beyond 400-500 yards ever with this rifle anyway.