I have a .223 I put together the lower on and purchased an upper. Last time I was at the range I had quiet a few failures to feed and failures to clear the ejection port. I got a lot of advice on possible causes, but at the time port preasure never came up. Anyway I am wondering if that is my problem. I am using IMR 4064 - it cycles fine in my stag arms model 3, however does not work in the aforementioned AR. I have plans to get to the range to use factory ammo, but I was hoping someone coud reccomend a powder with better port preasure. That way I can try both powders, or several at the same time to help nail down a cause. I also plan to bring 223 factory ammo to make sure the rifle will cycle that, as I did not have any on my first trip - last time I make that mistake!
Thanks!
Thanks!