I'm using between 9.5gr & 10.3gr H110 in an 8 inch 1/7 twist aero precison barrel; no tumbling. I'm getting 1,044fps avg with 9.5gr, no crimp; just whatever neck tension from the sizing hornady sizing die.
'til you burn out quickly & hyperfocus on a different hobby or switch divisions.
I think having discipline & being able to stick to a regular training schedule is a better advantage.
Is she just plinking? just lower the charge & put in a weaker recoil spring in the PPQ
If she's using her EZ 9 for self defense, she may as well get used to shooting standard 9mm loads.
Self defense ammo is going to be snappy in the EZ 9 anyways.
I'm using just the 13lbs wolff hammer spring with stock firing pin & it's popping fiocchies. I didn't put in the included wolff firing pin spring that came with the 13 lbs hammer.
Is your firing pin channel clean & dry? I thought an extended firing pin & 13/14 lbs hammer was supposed to be 100% in tanfos.
I'm not sure what it is, but the hammer spring in xtreme-s trigger group is stiffer than a wilson 12lbs. I assume the hammer spring from that trigger group is the same as what comes with the 92x performance.
Maybe try a regular beretta trigger instead of the short reach. I feel the short reach is too short in single action -- my index finger ends up hitting the frame before the sear can release the hammer.