I have 10 rounds each loaded from 20.0gr to 25.0 gr in 0.5 gr increments (110 rounds total). I stopped at 25.0 gr because that is the load I normally use for the 55.0gr bullets I use with H335.
If the weather cooperates, I will shoot these test loads over the chrony tomorrow and post my finding.
I am curious if the smaller loads will cycle the gas piston in my Ruger SR556?