What Jammed My 9mm?

This is a discussion on What Jammed My 9mm? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; I just got back from the range where I was shooting my way-cool HK P7. After running 4 mags through it with with no problems ...

Results 1 to 6 of 6

Thread: What Jammed My 9mm?

  1. #1
    Member Array alienbogey's Avatar
    Join Date
    Dec 2008
    Location
    Puget Sound Area
    Posts
    263

    Question What Jammed My 9mm?

    I just got back from the range where I was shooting my way-cool HK P7. After running 4 mags through it with with no problems , I slide-locked empty, popped in a fresh magazine, squeezed the grip to shoot the slide forward, sighted on the target, gently pulled the trigger and....nothing. No trigger resistance at all, all the way back.

    I couldn't figure it out at first, but upon examination I realized that the slide was about 1/8" from being all the way forward and into battery. Try as I might I could not rack the slide back - it was well and truly jammed. I had to bring it home with a live round stuck in it.

    I put it into a bench vise (with wood jaws) and eventually got it racked back and the round ejected. The case had gouges in it, especially at one point from the extractor (I think), but I'm not sure that the case is a 9mm Luger. (I reload from picked up brass)

    Rather than saying 9mm Luger this case's head stamp has: A tiny plus-inside-a-circle symbol, "W C C", and "02". That's it.

    Dimensionally I can't see any difference by eye between it and a sample 9mm Luger reload. I measured with a micrometer and came up with the following:

    Case OAL: Luger .749 WCC .741
    Diameter at middle of case: Luger .385 WCC .385
    Diameter of rim: Luger .388 WCC .387
    Diameter just above groove: Luger .391 WCC .394

    The profile of the groove and shoulders looks slightly different between the two.

    Any idea what the "WCC" case is, if it's 9mm Luger why it's not headstamped as such, why it jammed my pistol?

  2. Remove Ads

  3. #2
    VIP Member Array Blackeagle's Avatar
    Join Date
    Oct 2006
    Location
    Columbia, SC
    Posts
    2,147
    WCC = Western Cartridge Company a division of Winchester. It's probably a standard 9mm that either didn't get sized properly during reloading, or got dented or dinged up enough afterward to not chamber.

  4. #3
    Member Array alienbogey's Avatar
    Join Date
    Dec 2008
    Location
    Puget Sound Area
    Posts
    263
    Yes, it's one of my reloads, and must have gotten picked up as range brass.

    Quite a coincidence that the ONE round that jammed had the unfamiliar (to me) head stamp - when I checked every other round in the 4 boxes of reloads I had brought to the range had '9mm Luger' headstamps.

    All the more reason to practice only with reloads and use factory rounds for SD carry.

    Thanks for the reply.

  5. #4
    Administrator
    Array QKShooter's Avatar
    Join Date
    Dec 2004
    Location
    Off Of The X
    Posts
    35,064
    I'd call it an ammo issue with that one cartridge..for what my two bits are worth.

    Your next time out shooting will tell for sure though.

  6. #5
    Member Array alfack's Avatar
    Join Date
    Feb 2008
    Location
    Marysville, Washington
    Posts
    320
    If you have a case gauge, drop it in and see if it fits.

  7. #6
    Member Array M1911A1's Avatar
    Join Date
    Jan 2009
    Location
    Northwest Washington State
    Posts
    51
    I believe that the "tiny + inside a circle" part of the case's headstamp means that it's a military-issue, NATO-specifications case.
    Dunno why it jammed, though.

    Could it've been a sub-gun case that you picked up, loaded originally to higher pressures than pistol rounds, and thus overstressed and maybe even oversized at its base from those higher pressures?
    Steve
    Retired Leathersmith and Practical Shooter

    "Qui desiderat pacem, pręparet bellum."

Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. My pistol jammed.
    By FireAir7215 in forum Defensive Ammunition & Ballistics
    Replies: 13
    Last Post: January 9th, 2009, 08:25 PM
  2. XD.45 Jammed - Help
    By cop2b in forum Defensive Carry Guns
    Replies: 19
    Last Post: November 29th, 2008, 01:51 PM
  3. G19 jammed at range
    By dkpeppard in forum General Firearm Discussion
    Replies: 28
    Last Post: September 19th, 2008, 12:56 AM
  4. 9mm Jammed in a G27
    By ropinghorns in forum General Firearm Discussion
    Replies: 14
    Last Post: August 28th, 2007, 09:44 AM
  5. 5 Semi-auto's, only 1 never ever jammed.
    By sigbear in forum General Firearm Discussion
    Replies: 25
    Last Post: June 28th, 2006, 03:44 PM

Search tags for this page

9mm luger jam

,

9mm luger slide stuck

,
9mm slide stuck and trigger jam
,
how to un jam a 9mm luger
,
how to unjam 9 millimeter luger
,

how to unjam 9mm

,

how to unjam a 9mm luger

,
how to unjam my 9mm
,
if 9 mm is jammed
,
jammed+my+9mm help
,
luger 09 jammed
,

slide stuck on 9mm luger

Click on a term to search for related topics.