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Number of rounds to test new JHP

Discussion in 'Handguns: Autoloaders' started by peacebutready, Jun 9, 2012.

  1. peacebutready

    peacebutready Well-Known Member

    Good Day,

    For good quality, traditional steel 9mm's (ex: Sig, CZ, Browning HP, etc), how many rounds of a JHP that you never used should be fired until the ammo/gun combo can be relied upon?

    IIRC, some of the latest stuff approaches $1/rd.
  2. Hurricane

    Hurricane Well-Known Member

    Well I suppose the truest answer is "as many until you feel comfortable with". But for myself, I test fired several magazines of what I preferred to rely on, not only as function and accuracy, but to familiarize myself with it. I think I spent a hundred rounds on testing.

    In all honesty, you have a better chance of hitting the lottery than needing a gun someday, God willing. But even at $1 a round, if you figure 1 or 2 hundred rounds for testing, would you consider that a decent investment towards your life or your families life?
  3. The Lone Haranguer

    The Lone Haranguer Well-Known Member

    A couple, perhaps three, magazinefuls through each of the magazines you will be using, ought to be sufficient.
  4. 9mmepiphany

    9mmepiphany Moderator

    The old rule of thumb used to be 200 rounds without a bobble...one bobble and you start over. This was established back in the days when the autoloaders available were the 1911 and the Browning Hi-Power (P35). That is still a pretty good standard for the older designs

    I'd be willing to lower that to a minimum of a couple of full reloads through each magazines you are planning to use with a modern design. You really should be testing in one session without cleaning or maintenance during the test.

    I would also recommend that you run a couple of hundred rounds of ball through the gun before you start
  5. peacebutready

    peacebutready Well-Known Member


    How about a CZ? It's not as old as the 1911 or H.P. but older than the polymers.
  6. 9mmepiphany

    9mmepiphany Moderator

    In which caliber?
  7. leadcounsel

    leadcounsel member

    I mix in a variety of HPs and FMJs in random order (2-1-5-2-3-1, etc.). Gun should feed everything, in any order. I'm comfortable after a few mags. If there's a hickup, I spend a lot more time with it working out the issues.
  8. Creature

    Creature Well-Known Member

    For me, its at least three mags worth...from each magazine for that gun. Testing for reliability is expensive but worth it.
  9. fxstchewy

    fxstchewy Well-Known Member

    I load the last in the mag, middle in the mag and first in the mag, if it will fire a couple of mags this way i call it good................
  10. holdencm9

    holdencm9 Well-Known Member

    I agree with the comment that said as much as it takes for you to feel comfortable with that particular gun/ammo combo. If you have a gun that will typically eat anything you feed it, then a couple mags run through it without a hiccup is probably enough. If you have a gun that is somewhat "ammo-picky" then I'd probably want to run 50-100 rounds to feel confident.

    Confidence is a funny thing, and very personal. Just because you run 100 trouble-free rounds through your pistol without a jam doesn't mean it won't jam on the 101st shot. As such I'd feel more confident with a gun that I have fired 500 rounds with 1 jam, than one I have fired 2 magazines without a jam.
  11. MCMXI

    MCMXI Well-Known Member

    I shot 25 rounds of 124gr GS and 25 rounds of 147gr GS through each of three SIGs including a pair of P225s and a P239 to convince myself that I can trust the GS loads to function properly. After 150 rounds total (50 per pistol) without a single issue I was convinced. The 239 is my CCW at the moment and I'm using 124gr Golden Sabers.
  12. coalman

    coalman Well-Known Member

    I run at least 500+ trouble-free rounds through the gun BEFORE trying HP. I run only common HP brands in common loads that LE use. 50rds trouble free of HP rounds and I'm satisfied.
  13. peacebutready

    peacebutready Well-Known Member

  14. peacebutready

    peacebutready Well-Known Member

    O.P. Responses

    fxstchewy: Interesting...Have any experts advocated that?

    holdencm9: It's interesting that with mine, it seems to depend on the combination of OAL and olgive (shape). The chamber is a bit short. It seems like it's a good idea to stay away from ammo that has both a long OAL and fat olgive (not sure if I worded that right). An older JHP 115gr cycled through ok. Maybe I'll see how the older WWB 147gr JHP runs through it out of curiosity. It'll be a confidence booster if that stuff runs well.

    All: Thanks for your responses.
  15. 9mmepiphany

    9mmepiphany Moderator

    A CZ in 9x19mm is a very reliable pistol. You could likely get away with just a couple of full loads through each magazine
  16. Remllez

    Remllez Well-Known Member

    I agree with shooting a few boxes of ball just to loosen things up and to help wear in the moving parts, it's cheap and helps familiarize you with the gun. As others have said run rounds through all your magazines just to be sure.

    It's really up to you and your pistol, if you have mechanical problems your better off shakng them loose at the range. If all goes well after the ball break in then a couple mags of your defensive rounds should suffice.
  17. NG VI

    NG VI Well-Known Member

    I've never been able to make a 9mm CZ choke. I've only put factory and commercially reloaded (Georgia Arms) ammunition through any pistol, but those ones are pretty top of the line for reliability.

    And the best defense ammo isn't the stuff that costs a buck a round. It's the Federal HST and Winchester Ranger-T, available exclusively in 50 round boxes that run between the high teens and thirty dollars, and shipping is disappointing to see on your bill, but don't buy one box at a time and it's really insignificant compared to the convenience and satisfaction of getting exactly what you want, while being able to price compare instantly.

    I would go through MAH, TDS-US, Ammunition To Go, and I've heard Streicher's is a good one too. The first three are the first places I recommend anyone check.
  18. NG VI

    NG VI Well-Known Member

    And Sig's aren't steel.

    I'm usually more concerned with how my pistols feed a variety of the cheapest range ammo, and when I had them I would also get a bunch of range-level generic hollowpoint ammunition, with as many different weights and specific brands of bullet to make sure everything runs right.

    If it works well with lowest possible cost funtime ammo, it'll be great with highly quality controlled defense and duty ammo.
  19. peacebutready

    peacebutready Well-Known Member

    .40 & .45 CZ's

    Is the .40 version very reliable? How about the CZ-97 in .45?

    If anyone responds, don't write much as I don't want to take up anyone's time with this question.

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