I have two PMR-30s, one a few years old, and a new one. The new one is doing the same thing as the OP's and carwash's(?) and the primer strikes look like the OP's. Compared with the old gun, the firing pin strike is closer to the edge. It seems to be hitting hard enough. On the old one, the firing pin also mashes the edge, but the dent reaches about twice as far in, closer to the center of the case head. The design of the rim support block has been changed between the production of my old pistol and my new one. The old one had a round cutout to accommodate the edge of the rim. The new one is straight across, and keeps the edge of the rim lower relative to the firing pin. On the new gun, about half of the end of the firing pin is behind the rim support block and is hidden from view, and can't touch the rim. On the old gun, and on the extra slide assembly of the same vintage that I have, I can see the entire end of the firing pin, which can, and does, impact the rim making a bigger dent.
The first range trip with the new gun went perfectly, but was only a few rounds. On the last two outings, with both guns, the new gun had repeated failures to fire after it began to get dirty after only a few rounds (10-15). The older gun ran like a scalded dog and ate everything I fed it--BVAC ammo, which is old brass-cased Armscor, and Hornady 30 gr V-max. Same boxes of ammo for both guns. After the first new gun outing that had issues, when I cleaned it, the firing pin felt a bit gritty when I pushed it in by hand, so I pulled the cover off and cleaned and lightly lubed it, thinking there could be some metal turnings or other manufacturing debris in there. None found. This cleaning helped, but it quickly started failing again. This time, the firing pin did not feel gritty after the range session.
My theory is that the new design rim support block does not let the rim of the round go up as high relative to the firing pin, resulting in the strike being closer to the edge of the rim and more likely to not be an adequate strike. In other words, there is less tolerance for variations in the ammo, less tolerance for variations in ammo rim position, and less tolerance for dirt and debris on the bolt face and rim support block which can affect the position of the case head.
I'd rather not send my gun back to Kel-Tec. I may ask them to send a replacement rim support block--the old style, if possible. Another possibility is to reinstall the existing one and see if I can position it a little higher to expose more firing pin. It appears to be held in by two roll pins. A third possibility is to just use the extra old style slide assembly that I have. I shouldn't have to do that to a new gun. I like the finish on the new gun. They call it "blued" but it looks like a smooth, but matte, black Cerakote or something similar.
I haven't even gotten around to see if the new gun keyholes with 40 grain CCI like my old one does when I use the standard barrel.
The good news is that the new gun has never failed to strip a round and feed it correctly. The old gun is tighter, and it took quite a while to break in, plus a trip to Kel-Tec, where they filed on the feed ramp, which helped, but it still needed a bit more break in to get reliable.
buzzsaw