I just came across this thread and found the discussion interesting as I have found shooting Wolf caused endless FTF.
To solve the problem, I have removed the H Buffer and also a Young Manufacturing M 16 chromed bolt carrier which, is heavier than a regular by a couple ounces.
Function testing seems to show the short stroking problem is solved. The gun is a 14.5 N4 set up for a can (which I have no interest in)

