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Originally Posted by Smokin Joe
If a .308 round is placed inside the chamber of an MG 34 (chambered for 8mm) can or will the gun be capable of slam firing if the bolt is racked? Or Does the trigger have to be pulled in order for this scenario to occur? Thank you for your time, SJ
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Joe:
Who are you about to smoke and on what web site? He, he, he. I gotta see this one.
How about looking up each cartridge for their dimensions while loaded with what ever service load is being discussed. Taking a look in the Sierra Reloading Manual, it appears that the 7.62 brass will fit into the "8" X 57 Mauser chamber. However, the overall length of the .308 is shorter than that of the 8 X 57 by about .44 inches.
What this probably means is that the 7.62 cartridge will slide into the 8 X 57 chamber but will fall so far into the chamber that the firing pin probably won't strike the primer on the 7.62 cartridge.
Give me a overall cartridge length on both of the rounds this fellow is using and we will see. Off the bat, .44 inches is a huge amount of difference in terms of overall cartridge lengths.
Now, I have fireformed brass that was seriously short in headspace. This was possible because I seated the bullet out so far that it engaged the lands of the rifling and forced the rim into the bolt face.
Slam firing is a matter that has nothing do do with headspace. Any weapon that uses an inertial firing pin can slam fire. It is a fault of the firing pin, firing pin hole, and or worn out trigger parts.
Gene