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Don't use that powder so cannot help w/that side of equation.
If the gun is brand new you need to wear it in some.
Either load up a bunch of supers & blast away or sit in front of the tv one night & drive your family crazy by cycling the action over & over.
I polished a few areas of my hammer where it would catch on my bolt carrier & I installed a CAR buffer spring.
Mine will not hold open after last round but otherwise functions flawlessly w/subs or supers.
As I recall you must have a can on to get enough back pressure w/subs to get it to cycle .
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