Thanks, this is what I've checked out so far...
* The gun has internal hammers with robust coil springs, just like you'd see on a Citori
* Both firing pins have nice, rounded tips; with the shotgun pin 1.5X or more the size of the rifle's pin
* There are no burrs on the firing pins, hammers or spring struts; all looks good inside the receiver (and looks well-made too)
* The firing pins do rebound, as they have to (to be pulled away from the breech so the barrels can tip down)
* The firing pins don't hit straight on as on a bolt action, but come in on angles from the side and elevation
* Unfired factory loads, with the extractor removed, fit flush to the breech face (so I don't think there's any excessive headspace)
* Neither factory bullet engraves the rifling when chambered; they sit flush but not tight
* Fired brass measures 0.002" larger than the unfired ammo just about the extractor groove (as several online articles say to watch out for brass that grows by 5 thous' or more (0.005") as being over-pressure loads_
Based on all this, I'm inclined to believe the primer flow is a function of the top-break design with the rebounding firing pins (which are pulled away from the breech face, as the pins sit roughly 1/16" below the face of the breech after "firing").
I'll try out some handloads which work well in my Rem Model 700, and using different primers, to see if the primer flow can be reduced any.
For sure, I won't be firing dozens of rounds with this gun.
Old No7
