Jump to content
Brian Enos's Forums... Maku mozo!

Magazine Feeding Issues


Recommended Posts

I am shooting a 2011 style pistol, 9mm major, running sti magazines with grams springs and followers (just replaced).  Using both old and new style magazines (with and without spacers), I am having an issue where the bullets nose-dive inside the magazines and don't feed properly. They ultimately end up almost tumbling, and when I turn the magazine upside down, several bullets just fall out before the spring re-engages and pushes the rest into position.  I can't figure out what is causing this and it's very frustrating, especially because its causing major gun malfunctions at matches. Magazines are cleaned before use, and in between stages.  Still having problems.  Any advice would be very much appreciated.

Link to comment
Share on other sites

1.  Is this happening with all of your mags, or just one ?

2.  What's the OAL on your cartridges ?   Which bullet are you using ?

3.  When you "clean the mags", are you taking them apart and brushing out the insides ?


Oh, welcome  to The Forums.    :) 

Link to comment
Share on other sites

sounds like two things, both mean the tube(s) are out of spec.

1. the double to single stack transition has gotten too wide, causing the rounds to not come up into a nice single stack as they near the top of the tube.  There are videos on youtube about this and images here on be.com of how to squeeze this area in a vice.  It's easy but it's just as easy to completely mess up the tube.  If you are not mechanically inclined I would not attempt this.

2. the follower getting stuck in the tube is a symptom of the main area of the tube has gotten too wide and needs to be squeezed back down some.  The ideal width between the control ribs inside the tube is 0.740” for typ. Reloaded ammo, no narrower than 0.730”, no wider than 0.765” and keep tube square.  Too narrow left to right and there is less capacity.  Too wide left to right and the rounds can start to stack incorrectly and bind on each other.  Squeezing a tube in a smooth face vise is doable, but if needing to squeeze it you have to go further than what is needed for the metal to take a new shape.  Need to be very careful.  If you are not mechanically inclined I would not attempt this.

Edited by Glk21C
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...