Depending on how it's set up, it can burr the hammer, plus the knock open valve isn't under so much pressure...
It's a bit of a pain on the steyr.
Go easy on that sear engagement screw, you can get to the point where 1/16th of a turn is noticable, and that's not an exageration
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep