Worked down (not up) some loads today trying to find the how little powder I could use and still get all my ARs to cycle.
Working with 55gr boolits and H335.
18.3 gr seemed to be just about the lowest I could go and still keep everything functioning. Below that, I had function issues and and the accuracy went out the window. With 18.3 gr I was still shooting just about 1 MOA. When I dropped to 17.9 gr, I only had 2/5 on the paper plate and I had to manually cycle the gun because the bolt wasn't going far enough back to catch the next round.



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