Welcome ta The Club, Bro! :thumbsup:
First of all, field strip it an' clean the f**k outta all the pieces, inside and out. Ya prolly got some gunk in/on 'em from the factory. Firearms manufacturers don't like ta pack 'em up an' let 'em rust in transit or on the shelf!
IMHO, 1st time cleanin' is essential:
-field strip it.
-let the parts soak in some warm soapy water an' then air-hose 'em dry and lube with CLP, or if ya really wanna get the ball rollin', spray all the parts down with Simple Green or some other mild degreaser and toothbrush all the surfaces clean an' let 'em soak a bit in some warm water an' air-hose 'em dry.
-CLP the Hell outta all the parts an' air-hose the CLP back off. The CLP residue will be sufficient for your break-in if you clean and lube during your break-in outtings.
The tolerances on Steyr products are tight to begin with an' ya gotta let the mating surfaces hone themselves to perfection. How much lube you use will depend on your shooting habits, 100 rds atta time or 500 rounds atta go, or if you take time to clean an' lube between mags of downrange time. <shrug>
You get the idea.
And, you have the new extractor so the head-knockers are a bit of a surprise, makes me think ya got gunk in the extractor channel.
What ammo are ya usin'? That could be an issue, as well.
Steyr 9x19MM pistols are designed for 124 gr. NATO ammo, or around +P specs. After the break-in period, lighter loads are more apt to perform with greater cycling reliability.
Steyr products are works of art an' ya gotta "grok" 'em.
Just a thought. <shrug>
Take care, Bro an' keep us in the loop.
Wulf <-- endeavors to grok 'is Steyrs :thumbsup: