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Help! My HK-P7 PSP Dont Woik!

Discussion in 'Handguns: Autoloaders' started by The Rabbi, Feb 24, 2005.

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  1. The Rabbi

    The Rabbi member

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    I was shooting my P7 today. I have kept it pretty clean and well serviced. I put about 75 rounds of Wolf/Blazer through it with no problem. Then I had some left-over Aguila IQ bullets and decided to try them as my wife wants to carry the gun. I only had 4 or 5 left. Every round was a failure to eject or feed or stovepipe. OK, no problem. I'll use them up and thats the end of them.
    On the last round I tried opening the slide and it is stuck. Tight.
    Now what? THanks.
     
  2. Zak Smith

    Zak Smith Moderator Emeritus

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    Are you saying the last round loaded into the chamber was not fired, and you can't retract the slide?

    Shoot it.


    -z
     
  3. The Rabbi

    The Rabbi member

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    No. the chamber is empty, as far as I can tell.
     
  4. Zak Smith

    Zak Smith Moderator Emeritus

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    The slide doesn't budge at all?
     
  5. Wildalaska

    Wildalaska member

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    Gunsmith time!

    WildwolfagainAlaska
     
  6. The Rabbi

    The Rabbi member

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    Zilch. Tighter than Dick's hatband.

    For all the comments, I have used Wolf ammo on a variety of guns and it works fine. It worked fine here too. This isnt the first time I have shot it in the HK and never had an issue. I am inclined to think it the Aguila.
     
  7. Zak Smith

    Zak Smith Moderator Emeritus

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    I think WA is right.

    I think there are two places something could be stuck. The first is the chamber area-- for example, if an unfired cartridge has its bullet ogive stuck in the lands, or of a fired cartridge is somehow stuck to the chamber walls. The second is the gas piston system.

    -z
     
  8. SDC

    SDC Member

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    I think you're probably getting a weird time/pressure curve with the IQ ammo, something that doesn't mesh well with the gas-delayed blow-back system on the P7.
     
  9. The Rabbi

    The Rabbi member

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    Thank you. How do I get the slide off?
     
  10. Texas Bob

    Texas Bob Member

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    With a "lot of force" using a "small rubber mallet", you'll need to force the slide to the rear until you can line up the disengage notches. I've been shooting P7's for ten years now. The "only" times I've had them seize up like you describe is when the gas piston and cyclinder are locked up with crud. Try placing a wooden dowel in the barrel and tap it to the rear. Some ammo is dirtier than others even from the same mfg. Oh, remove the fireing pin assembly before tapping to the rear, if you can. hope this helps. This is why I pay attention to keeping the cyclinder and piston realively clean after each shooting. The tolerances between the piston and cyclinder are about 3/10,000.
     
  11. schild

    schild Member

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    Why would you want to take a firearm that is built like the proverbial Swiss watch and shoot that assortment of crappy ammo. Wolf ammo is made by people that get paid with vodka.
     
  12. Missouri Mule

    Missouri Mule Member

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    I had somthing similar happen to a CZ-75.
    The culprit turned out to the, Green Wolf laquer issue.
    Warm chamber, laquer softens, chambers cool and the case is stuck.

    I have fired exactly 50 rounds of that stuff and only in that CZ.
    Never again!!!

    I used the soft rubber mallet and the wooden dowel methods to free the gun up. The extractor wound up chipped also.

    No disrespect but stop with the crappy ammo. In the long run it isn't any cheaper that Winchester White box.
    I understand that everyone has their motivations.
    But, if I owned a classy and expensive pistol like a P7 I wouldn't shoot the cheapest possible ammo in it. It deserves better.

    Then again I wouldn't use "Green" wolf in anything I own ...given a choice.

    Good luck!
     
  13. The Rabbi

    The Rabbi member

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    Texas Bob,
    Your suggestion worked like a charm. The P7 is now back to its pristine working state. Many thanks, friend. Or as they say in your part of the country, muchas gracias, amigo.

    Schild, I think that any gun associated with the word quality needs to be able to feed and fire virtually any ammo chambered for it. This is called "reliability". It is why I wont buy those sissy 1911s. My SIGs never had this problem. Neither have my revolvers.
     
  14. SouthpawShootr

    SouthpawShootr Member

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    Sissy 1911s?

    I have 3 Colts. The only time one of mine choked was when I tried using a Wilson extended slide stop in an Officer's ACP. Turns out the aftermarket part was moving to lock the slide back under it's own mass during recoil. Of my other 1911 pattern pistols, the only one to give me grief was a Para-Ord P13. Needed new recoil spring and mag springs (Paras are somewhat notorious for coming from the factory slightly undersprung).

    God, I love this place. The recommendation about solving your problem with a dowel would be of tremendous help if one of my P7 pattern pistols does this.
     
  15. wally

    wally Member

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    I'm betting the Aguila ammo is not a traditional jacketed bullet design. I had difficultly with my P7 after shooting a few rounds of my hard cast lead reloads. Lead shaves off and binds gas delay piston.

    --wally.
     
  16. Texas Bob

    Texas Bob Member

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    Glad I was able to help. BTW, the P7 is built like a Porsche. Now you wouldn't put the lowest grade gas and use it for an "off-the-road" and complain it misfired. It was designed as a "city-gun" to be used as both a ccw or open carry and enable the user to dispatch a terrorist with a "head-shot" within 15 meters. The 1972 Munich incident gave birth to the P7, Sig 225, and the Walther P5. As far as ammo, the P7 was designed to operate with bullet weights of 100grs or more. When it was designed, there were no 147gr 9mm on the market, so that weight seems to work in some guns and not others. It seems most people get the best results using anywhere from 115 to 124. I use the M13 for matches, and ccw the M8. Check out www.parkcitiestactical.com "The Cult of the P7" for more info on the P7 series of pistols. Take care of your sidearm as if your life depended on it, because...... :)
     
  17. Trebor

    Trebor Member

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    A friend of mine had her P7M8 lock up tight during Mas Ayoob's LFI class. It was near the end of a long string of fire. The gun locked up tight with the slide closed and she had to wait until the pistol cooled down to get it open. I believe she was shooting S&B at the time.
     
  18. only1asterisk

    only1asterisk member

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    Wolf isn't ammo, it's crap. Your pistol simply asks to be fed decent ammo. Saving a couple bucks on ammo isn't worth the damage to your gun. Pennywise and dollardumb.


    David
     
  19. 9mmepiphany

    9mmepiphany Moderator

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    back when i first got the p7 psp i also had this happen when shooting winchester 147gr subsonic JHPs...department issue at that time. turns out it was just crud getting into piston system.

    letting it cool helped some, but it mostly took brute force to push the slide back. i got into the habit of not closing the slide, after locked-back on the last round, until i was ready to fieldstrip and clean it. just leave the slide open next time.

    winchester white box, at wally world, is the most available 9mm plinking rounds in my area and i can't imagine wolf being much cheaper, but i don't think i would hesitate feeding it the russian stuff either. my p7 will digest just about any ammo on the market, but i learned not to feed it lead bullets, silvertips or 147gr bullets.
     
  20. c_yeager

    c_yeager Member

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    So you place no liability at all on the people who manufacture ammo that is out of spec or made with substandard components? There is crappy ammo out there just as there are crappy guns. I won't own either.
     
  21. Obiwan

    Obiwan Member

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    Any weapon can malfunction with bad ammo

    They can even expode with real bad ammo
     
  22. The Rabbi

    The Rabbi member

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    Funny you should mention Silvertips. I was thinking of just those for a carry load for my wife. What problems have you had with them and is there a better solution?

    I think your statement would come as a surprise to the thousands of users a year. If it were really all that bad word would get around pretty quickly and people would stop using it. As it is, Ihave used Wolf in SIGs for quite a while. I never had a problem with it.
    Comparisons with Porsches etc are simply misleading. Porsche owner's manual specifically specs premium grade fuel. The HK owners manual specs 9x19/9mm Luger (for that caliber) and says, Do not use reloaded or remanufactured ammunition. Never use lead bullets...Use only jacketed factory ammunition. Pistols safely function with all factory brands of jacketed hollow-point ammuniton.
    So I did just that and had a problem. Maybe HK needs to change its manual.
     
  23. triggertime

    triggertime Member

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    It was the Aguila not Wolf. I have shot thousands of rounds of Wolf through my pistols with nary a problem. FWIW, a box of Aguila IQ did the same thing to my Beretta, which was remedied with a dowel/mallet treatment.
     
  24. Chipperman

    Chipperman Member

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    I shoot a lot of Wolf ammo in some guns (Mainly Com-Bloc). But Wolf does not go anywhere near my HK's.

    Use WWB and don't look back. I get WWB for about as cheap as I can get Wolf anyway.

    Do you have a reamer tool for the cylinder? If so, spray some MPro7 in and let it sit for 10 minutes. Then ream the snot out of the cylinder. The stuff gets cooked on the inside of that cylinder, as it gets extremely hot. MPro7 seems to get out more of that stuff than some of the other cleaners I use.

    The last time one of my P7's jammed like this, I cleaned a bunch of crap out of the cylinder that I did not think was there.
     
  25. Chipperman

    Chipperman Member

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    PS, If you Don't have the reamer, you need to get one.
    Call HK, sometimes you can get lucky and they will send you one.
    If not, check out the Cult at Parkcitiestactical. People there will have them for sale (either HK or homemade).
     
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