Details
waktasz said:
The jam I get on the last round in the mag is the same jam I get if I don;t pull the slide all the way back and release while hand cycling.
____________________
Okay...
Describe the jam in detail.
Does the round enter the chamber at all...or does it stop on the ramp?
If it enters the chamber...even a little...how far does it go and what is the estimated cartridge angle? About 45 degrees? More? Less?
If it doesn't enter the chamber...What area of the case is the bottom of the breechface making contact? At the back of the rim? In the extractor groove?
Factoids:
The most likely place to have a mag-related malfunction is on the top round
in a full magazine during a slidelock reload, or on the last round. This is due to extremes and varying spring tension as the magazine goes from maximum to munimum as it empties.
Most feed malfunctions with a 1911 occur on the top and last round, with
the last round being more frequent at a ratio of about 3:1 or so.
Fully 85% of feed malfunctions in a 1911 are magazine related, with
the extractor coming in at about 10%. The rest can be attributed to
ammunition tolerances, assuming that the ramp and throat geometry are in-spec and the breechface is smooth and correctly dimensioned...and the slide isn't oversprung. I can't overemphasize the effect that a too-heavy recoil spring can have on even an exceptional 1911. Many people mistakenly install an 18 or even a 20 pouind recoil spring in order to force-feed a gun with a return to battery problem, when something else is causing the problem...and bring on other issues related to slide timing and velocity.
The Devil's in the Details. Standin' by...