Question Lon, did you assess what caused the malfunction on your wife CZ. Seems that there are only four possible reasons for a box magazine to bow: misplaced box during reassembly - it happens; fiercely over tightened action screws; wood having progressively shrunk to the point where normal torque on the action screws bends the box; or wood swelling and compressing the box. Maybe I am missing some other potential reasons, but it would be really interesting to know...
Thanks
Pascal
Hi Pascal, at this point I am not sure. First the action was professionally glass bedded, the screws were properly torqued. I have quite a collection of new and used spare Mauser, CZ & M-70 parts at one point I went to a follower that was slightly longer than the one that was original to the rifle. The crazy part is hundreds of rounds were cycled through the action after that, up until two days before the test. The barrelled action has not been removed from the stock in several months. Here is what has happened, the wood blank came from a area with very low humidity, we live on the banks of the Zambezi very humid. Then we have had lots of rain recently. The rifle was in a soft gun case for the two day trip to Harare. Stowed in a hidden compartment, inside the vehicle for the trip. I believed this caused a very high humidity condition that led to the slightest bit of swelling of the wood, which put just enough pressure on the magazine box, little more than six months ago this stock was a wood blank!
Somewhere I read how long it should take to make a rifle stock it seemed to me it was something like a year. This is due to the fact that the wood changes as it is worked. Maybe someone out there can enlighten me or us?
At this point I am only half way home later this week I will disassemble the rifle and examine everything very closely.