Failure to feed when loading mag

[MarilynMonbro]

When loading my P09 the first round sometimes does not feed.  I have no feeding problems when firing, this only happens when loading. Happens when using the slide lock and sling shotting the slide. It happens with a stock recoil spring and with a 15lb recoil spring.  I have 6 mags and it happens randomly with each one.

I thought it was a dirty extractor so I cleaned it approximately 700 rounds ago. Still happens. This happens 1 or 2 out of 10 "load and make readys" if that makes sense. I attached a few pictures and a pic of the round. It goes in fine when I load the round back in the magazine and try again

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[MarilynMonbro]

And sometimes if I push the slide forward with both my thumbs it will load in. But sometimes it won't.

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[s0nspark]

Not sure if it is related but I had issues on occasion with the edge of the casing getting caught on the front of the feed ramp.

It seemed to be very ammo-specific and I only experienced it with practice ammo...

[Dan-O]

Maybe it?s the lighting, but it looks like you might need a little more taper crimp? Have you tried different shaped bullets?


[Mods corrected crimp style]

[MarilynMonbro]

Not sure if it is related but I had issues on occasion with the edge of the casing getting caught on the front of the feed ramp.

It seemed to be very ammo-specific and I only experienced it with practice ammo...

Maybe it?s the lighting, but it looks like you might need a little more taper crimp? Have you tried different shaped bullets?

Another guess I had was related to my reloads too.  I was thinking either the rim of the case was banged up and was getting caught in the extractor, or the edge of the crimp was getting caught on the ramp.  But I'm just stumped because it never happens when firing, just when loading the first mag

 I haven't used another shape bullet. I've gone through about 6,000 of these 135TC blue bullets.

[SI VIS PACEM PARRABELLUM]

Buy a box of quality factory loaded ammo and see how that functions. If no malfunctions look back to you reloads. Something may have gone amiss there.

[MarilynMonbro]

I haven't tried that yet. I have a couple different boxes I can try

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[s0nspark]

Having the issue when chambering actually does make some sense.

I'd say recoil cycles the gun more forcefully than most do by hand.

;-)

[M1A4ME]

How many rounds in the magazine?  19?  or less? 

If it's a fully loaded magazine and it hangs at 19 rounds, have you tried loading one or two less and seeing if it hangs up like that?  Not suggesting you load down on the magazine, just that a full magazine creates a lot more pressure/friction with that first/top round on the feed lips and the second round in the magazine.

If loading down on the magazine by a round or two "fixes" it you might look at disassembling a magazine and polishing the inside of the lips just a little right there at the top.

And cleaning the breechface real good.  Some solvent, a brush and some patches and just scrub it till it's good and clean.

[daved20319]

Maybe it?s the lighting, but it looks like you might need a little more taper crimp? Have you tried different shaped bullets?

I was thinking the same thing about the crimp in the second pic, it looks like you haven't quite ironed out the mouth bell, a little more crimp might be the answer.  I was also wondering about OAL, hard to say just by looking, but they look kind of long.  Good luck, and keep us posted.  Later.

Dave

[MarilynMonbro]

How many rounds in the magazine?  19?  or less? 

If it's a fully loaded magazine and it hangs at 19 rounds, have you tried loading one or two less and seeing if it hangs up like that?  Not suggesting you load down on the magazine, just that a full magazine creates a lot more pressure/friction with that first/top round on the feed lips and the second round in the magazine.

If loading down on the magazine by a round or two "fixes" it you might look at disassembling a magazine and polishing the inside of the lips just a little right there at the top.

And cleaning the breechface real good.  Some solvent, a brush and some patches and just scrub it till it's good and clean.

It happens at 11 and 18. I usually load my practice sessions to 18/19 but in matches I load to 11 and it happens then too

Maybe it?s the lighting, but it looks like you might need a little more roll crimp? Have you tried different shaped bullets?

I was thinking the same thing (well, almost, that should be taper, not roll crimp), in the second pic, it looks like you haven't quite ironed out the mouth bell, a little more crimp might be the answer.  I was also wondering about OAL, hard to say just by looking, but they look kind of long.  Good luck, and keep us posted.  Later.

Dave

They're loaded to 1.105 -1.110

I'm about to try with factory ammo. Will report back in a jiffy

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[MarilynMonbro]

I tested 50 factory rounds and had no issues. I tested 30 reloads and 2 failed to go in. The crimp on those is 0.3785 and 0.3780

Dillon calculator says

Neck tension only_(.000)0.375

Very Light Crimp_(.001)0.374

Light Crimp_____(.002)0.373

Moderate Crimp__(.003)0.372

Heavy Crimp____(.004)0.371

And

Neck tension only_(.000)0.377

Very Light Crimp_(.001)0.376

Light Crimp_____(.002)0.375

Moderate Crimp__(.003)0.374

Heavy Crimp____(.004)0.373





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[MarilynMonbro]

I just sized a case and shoved a bullet in it. The "crimp" measures 0.3755

I've never done this test before. I saw it on the crimp thread.

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[Winkel]

On all of my new 9mms, I always polish the breech face, the feed ramp and the inside top of the chamber. 

I don't go crazy, I just use a little Imprez diamond polish mixed with a little oil, on the end of a bamboo skewer that is flattened and rounded over a little.  This may be frowned upon by some but to me, it's just accelerating the wear you'd see by normal use.

After doing this, with factory loads, I can literally baby the slide home and it will feed a round.  Of course, again, this is with factory loads. 

I always polish by hand and polish in the line of draw with respect to the two moving parts.  IF you do this, just make sure you don't get any polishing compound in the firing pin hole. 

[Tok36]

My guess is the high shoulder of that bullet.

Very nice pics. Thank you for that.