Failure to lock back
I was wondering what the main cause for failure of the luger action to lock back? I purchased my first luger this week, an all matching 1937 S/42. I plan on it being a safe queen and show and tell piece but I could not resist at least trying it out. I ran a total of nine 8rd mags through the pistol. Rnds 1-7 perfect every mag. Now for round eight. With four mags of WW white box ball ammo it shot all eight and would not lock back. Using five mags of reloads (4.5gr W231, 115gr ball, oal 1.165):
Mag 1: shot all eight with lock back
Mag 2: shot seven and locked back with 8th rd still in mag
Mag 3: repeat of 2
Mag 4: stove pipe on last round with bullet facing the sky
Mag 5: shot all eight with lock back
I had different results using different ammunition. I am assuming this is probaby the cause or would it be a weak mag spring? This is the original matching mag. I guess its not that big of a deal and it won't be shot very often but I'm still curious. Appreciate any advice.
Pat
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