Thread: 22 Hornet factory ammo

I presume you mean the primers are protruding after being fired? If so I have 2 Hornets and they both do the same as yours. One is a '49 Brno and the other modern Savage. Most annoying. So, both mine have headspace issues. Was common for the old Brno ZKWs but pisses me off for the modern Savage. The issue with my rifles (and yours I bet) is made worse by the fact that the SAAMI rim thickness specs for the Hornet is 65thou” but no factory ammo has rims that thick. Run closer to 62 thou”. One work around that Robbie Tiffen put me on was to put a very thin O ring down over the case to the rim and fire it. Quite hard to close the bolt and the O rings only last a few shots, depending upon your type of extractor and how it damages the O ring. This should blow the shoulder (what there is of one) forward and instead of head spacing on the rim it headspaces on the shoulder. All good, fired a whole lot like that and no primer protrusion. Reloaded them all fired again and back to protruding primers. I think because the shoulder is so miniscule and the cases so thin the firing pin force just pushes the case fwd in the chamber at the fraction of a second b4 ignition. Back then to primer being able to protrude. I also tried pushing the shoulders forward by seating the projectiles right out to touch the rifling (needed to reduce load). Bolt hardish to close but when fired same result, primer sticking out. I just live with it now but keep a very close eye out for signs of case separation.