9mm ?

Discussion in 'General Handgun Discussion' started by deathkricket, Apr 11, 2010.

  1. deathkricket

    deathkricket New Member

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    I am new to owning a 9mm but i saw somthing that confused me, i picked up a box of Blazer 124g fmj, but while i was looking around i seen a box of police 9mm ammo that was 124 grain and the warning was along the lines of, this amunition has more pressure then normal amunition and should only be used in specialty firearms, now the Blazer i picked up says nothing about it being +p so i was wondring if a 124g round has more pressure then regular but not enough to be +p and if it is safe to shoot on a regular basis out of my Taurus millenium pro.



    EDIT: (read 3rd post cuz i explained this one confusing)
     
    Last edited: Apr 11, 2010
  2. Viking

    Viking Active Member

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    Weight of bullet doesn't have a bearing on pressure, the P+ has a higher pressure powder load and usually a considerably higher foot per second and foot pound energy level. Your firearms owners manual should have info as to your weapons ability to handly a P+ ammo.
     

  3. deathkricket

    deathkricket New Member

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    Cool i though so but a guy in the gun store said they had the same ballistics but none of them said +p and it just confused the crap out me because i was wondring how one can have a pressure warning and the other dont and why it even has a pressure warning but no +p on the box of the police ammo.
     
  4. WDB

    WDB New Member

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    The grain is the weight of the projectile/bullet. Your picture appears that you are in the Army, something I expect that was taught to you at basic. +p is all about the powder and will be clearly marked as +P. As mentioned check your owners manual to see if your firearm is able to handle +P.

    Always good to have another WA member and if your in the service, thank your for your service.
     
  5. deathkricket

    deathkricket New Member

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    Thinking about what i wrote i now see it is confusing, the point i was trying to get across was both the blazer and police ammo were 124g FMJ with the same BALLISTICS ( to include powder load) but one have a pressure warning but no +p and the Blazer not have anything if that makes sense.....i know what the grain is
     
  6. deathkricket

    deathkricket New Member

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    this was a assumption that some people might know the ballistics of the Blazer 124g FMJ none plus +p ammo
     
    Last edited: Apr 12, 2010
  7. Gojubrian

    Gojubrian New Member

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    That is confusing. Same weight,same everything,but one warns or high pressure?? I wouldn't worry about it though. I shot plenty of it through my pt111 when I had it, but I never shot any +p through it. I didn't like the way it handled range ammo...nonetheless.... :p
     
  8. deathkricket

    deathkricket New Member

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    Cool, i dont know what brand that police ammo was, all it said was police 124g fmj, 9mm and thats all, i was wondering if maybe it was old ammo or something back when 9mm couldnt handle todays loads, but that makes no sense as im sure the gun strength hasent changed...
     
  9. Gatekeeper

    Gatekeeper New Member

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    It is possible to have the same grain bullet at the same velocity with different pressures.
    Different types of powders have different burn rates and can generate more or less pressure to generate the same velocity.
     
  10. Viking

    Viking Active Member

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    This is very true, especially when handloading the same type and weight of bullet with different types of powder. P+ loads like those used in .38 Special are often a step between a standard .38 and a .357 mag. A good example of different powders under the same type bullet, from the Hodgdon's manual. 180 gr. bullet for 40 S&W cartrage, using 800-X powder putting the bullet out at 1030 feet per second the pressure is 26,000 psi and using the same type 180 gr. bullet with Universal powder the bullet is traveling only 16 fps more but the pressure is 33,400 psi. Perhaps the greatest difference in pressure is due to the speed at which the powder burns, Universal is #26 on the burning rate chart and 800-X is #32, which is slower. Universal powder probably creates it's highest pressure right after the primer goes off and drops as the bullet travels down the barrel and 800X being slower burning probably carrys it's high pressure throughout the bullets travel down the barrel. Sometimes slow burning powders create spectacular fire balls at the muzzle because they have not been fully burned in the barrel. I've seen H-110 powder, #49 on the burning rate chart, create a bright fireball about the size of a soccerball.
     
  11. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    First off, the term "police ammo" can be a marketing ploy to convince you it is some how "better" than civilian ammo. Just because it says police ammo does not mean it is actually used by police, anywhere.

    Where did you get the information about the ballistics? You are assuming they have the same ballistics which would require they have the exact same bullet or bullets with the same ballistic coefficient. If they had the same "advertised" velocity, it is just that...advertised. How they actually perform in a given firearm depends.

    Unless they are both made by CCI/Speer they almost assuradely do NOT have the same powder charge. CCI/Speer uses powder made to their specifications. It may be the same powder tht is used by company "B" but in all likelyhood not. It is powder made for them to their specifications.

    +P is a term that is defined by SAAMI, but misused by many ammo makers. SAAMI specifies a max chamber pressure for 9mm ammo as 35,000 PSI and 9mm +P as 38,500 PSI. There is no standard for +P+. If ammo is loaded to 35,001 PSI it should be labeled as +P. If a company normally makes ammo that generates 32,000 PSI and this load is 34,500, they might label it as having "more pressure". It is not, however, +P.

    Not all ammo or firearms manufacturers are SAAMI members and do not neccessarily comply with SAAMI reccomendations.

    To complicate matters, not all calibers even have a "+P" standard. I have seen .40 S&W ammo labled +P when no such standard exists. I have heard people refer to .45 Colt (Long Colt) +P. There is no such animal. If ammo is loaded hotter than the "standard" some are inclined to label it +P. It may be
     
    Last edited: Apr 13, 2010
  12. Fisherking

    Fisherking New Member

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    +1 on the fire ball from H110 . I use it in my 44 mag and in low light it is realy impressive.
    I like the slower burrnig powders because you usualy get lower pressures from them which intern put less stress on you firearm.
    My 2 cents F.K.