I experienced an other odd problem with my Reising. Upon chambering a round the action would lock up, and the cartridge would not fire. Cocking the action to eject the round was difficult to say the least. The odd part is that it would not happen every time. But if I tried to chamber to same round again, once again the action would lock up. The suspect cartridges would drop right in a case gage, and when double checked with a dial micrometer was in-spec Ammo was Fiocchi and my reloads. Out of a box of 50 there might be one or two cartridges that lock up the action.
I just tried the suspect cartridges in my other Reising, does not lock it up, so its probably not the ammo.
Anyone else have a similar problem?