[stagpanther]

Just so happens they are some of my favorite bullets for 9mm loads. I find it alarming that a load that formerly worked great for you could produce repeated squibs--something major bad is going on here and I find it unlikely it's a choice of powder/primers etc that went from great to almost catastrophic failure. Some firearms have problems chambering the shape of XD bullets, but it sounds like that wasn't a problem with your's--at least at first.

My wild guess is that somewhere along the way your bullets might not have been gripped tightly enough and may have moved around--1.1" is pretty short compared to the standard 1.16" and the bullet may have started too soon or maybe even parted company with case entirely upon chambering (?)--one of the only ways I can come up with for reducing the pressure so much the bullet lodges in the bore.