HK45 Endurance Test: Week Twenty Five

28-Sep-10 – 10:38 by ToddG

35,261 rounds

0 stoppages 1 (*) malfunctions 1 parts breakages

The trigger spring broke this week, at round #35,069, just 3,453 rounds after it was installed. The pistol then fired another twelve rounds (finished the mag in the gun plus one complete additional mag). The trigger had to be reset manually for each shot. After that, luckily I had a spare and was able to replace it in about 15 minutes at the range. Almost 200 rounds went through the gun after the new spring was installed without further incident.

A big chunk of shooting this week was continuing with the 3×5 card drills:

  • 2 on 3×5 card at 7yd in 1.8 seconds: 78%
  • 5 on 3×5 card at 7yd in 2.5 seconds: 69%

There was a definite incremental improvement compared to two weeks ago. Working on the little cards at maximum speed has definitely forced me to redouble my efforts in terms of sight tracking and press outs.

Another significant portion of the week’s practice was WHO (weak hand only) shooting… not planned, but after hundreds of rounds of practice my right wrist was starting to suffer and it seemed like a perfect excuse to work on weak hand skills.

This coming week, the HK45 will be at the Aim Fast, Hit Fast class in Culpeper, VA. The first day of class also happens to be LIVESTRONG Day… which is a great reminder that the edition of SKD Tactical’s great new Zero Tolerance knife is raising money for LIVESTRONG!

Train hard & stay safe! ToddG

Previous HK45 Endurance Test posts at

  1. 12 Responses to “HK45 Endurance Test: Week Twenty Five”

  2. Bummer to hear about the spring breaking, impressive run as far a parts breakages. Sounds like a bad spring to me if it broke so early on in to its life cycle. I know that the P30 had some spring issues, I wonder if HK uses the same supplier they always have or if they have switched on the most recent pistols.

    By Blake B. on Sep 28, 2010

  3. HK is the spring supplier to the best of my knowledge.

    By gtmtnbiker98 on Sep 28, 2010

  4. That kind of deflates it a bit. I’d imagine the usual explanation would be “all man made can fail”, but this will open a discussion re: quality control and which part of pistol’s performance – out-of-this-world first 30K or mediocre part life of 3400 – are more indicative of HK durability. The optimists will turn to historical performance data, and pessimists…

    It is like serving up an ace, and the double-faulting on the very next point, but such is life…

    By YVK on Sep 28, 2010

  5. also a great reason to donate to Livestrong again!

    By Rob Engh on Sep 28, 2010

  6. Impressive! Nice Sinn by the way.

    By Chuck T on Sep 28, 2010

  7. Wow that sucks. Bad QC IMO.

    By JoshM on Sep 28, 2010

  8. I’m not sure you can QC every trigger return spring enough to guarantee one will never break early. It’s worth noting that every single endurance test gun here at (M&P9, P30, HK45) has broken its trigger return spring.

    Chuck T — Thanks! The 757 UTC is brand new and I’ve been really happy with it so far.

    By ToddG on Sep 28, 2010

  9. I agree with YVK, failure of a 3400 round spring kind of taints the whole test. My only issue with all of these tests are that you are only dealing with single sample. In the P30 test you had a faulty mainspring early on and now this one has an early failure.

    Something to ponder I guess.

    By marshalldodge on Sep 28, 2010

  10. “I’m not sure you can QC every trigger return spring enough to guarantee one will never break early. It’s worth noting that every single endurance test gun here at (M&P9, P30, HK45) has broken its trigger return spring.”

    What worries me is 3400 rounds is not much at all. I wonder how many are ready to kick the bucket? If that happened during a fight… I probably have at least 3000 rounds through each of my HKs.
    Of course this is not really statistical evidence of TRS breaking early but I would hope for more consistent results as to how long a TRS is expected to last. Right now we have between 3400 and 18000 rounds.
    Trigger rebound/return springs seem to be the weak point in these pistols and many others. I wonder what can be changed in the pistol design to incorporate some different system.

    By JoshM on Sep 28, 2010

  11. Quick, someone find a way to blame Todd.

    By MikeB on Sep 29, 2010

  12. Hey a least we have a real failure. (Then again are you sure you put it in right. ;-)) Sounds like this TRS was supplied from China. HK better watch out for that or they’ll be slipping like Sig.

    I would put the original one back in–then see how many rounds it goes in total.

    By P30man on Oct 3, 2010

  13. Notice the trigger springs only break after he takes the unbroken one’s out and “replaces” them. Also, notice there were 0 malfunctions until he disassembled it and then reassembled it (incorrectly by the way). I think the malfunction and the failure have ALOT more to do with the operator than with the gun.

    By Joe on Oct 9, 2010

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