So the holes for the screws don't go through to the firing pin channel. I wonder though how tight the firing pin assemble should fit in the channel. I had to give it a pretty good tug to remove it .
Got it stripped down, cleaned, inspected, new channel liner, and reassembled. Don't know if it is fixed, I fired 70 rounds of the Freedom and 30 rounds of S&B with no issues. What I can tell you that surprised me a bit was that removing the DPP and the mounting plate and then putting them back on resulted in a huge lateral shift in point of impact. I had to really crank it left to get it rezeroed.
Likes pretty much everything in every caliber.
I figured it was the mounting plate to the gun where the variance was, not the DPP to the plate. Not sure though. I took the DPP of the plate while at the range and put it back on and it didn't change.