Yeah ended up putting an adjustable gas in it barely opened and got her tamed downIf you're not running an adjustable gas block, I would get one pronto and tune it. That, plus a heavy buffer will help keep that bolt closed a hair longer.
And finally, Superformance is pretty gassy / dirty stuff. I would try some Staball 6.5 or H4350.
That's was just the first shot out the barrel , had just cleaned it real good so still and a decent bit of solvent and stuff still in it .. barley smoked at all after 5 or so lolHead gasket or rings, how wet are you running it?