ammo question

Discussion in 'Caliber Corner' started by pochis, Jan 28, 2020.

  1. pochis

    pochis

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    I was looking at some win nato 124 gr fmj and it showed 1150 fps, then I saw magtech nato same size show 1329 fps. with both being nato does this sound right to you cause I thought most nato was up to 1200fps. thanks for the help
     
  2. fredj338

    fredj338

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    The proof is in the chrono but I am betting no. That is almost 9mm major. I am betting typo.
     
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  3. M 7

    M 7

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    Maybe also look at the barrel length from which the MagTech was tested. Some manufacturers test from longer than typical barrels; 7.8 inches in some cases meant to simulate PDWs.
     
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  4. collim1

    collim1 5ft of fury. The champ is back!

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    Trust no claims from any manufacturer.

    Chrono’ing yourself is the only way to get an idea what a round does from your gun.
     
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  5. GunsNweights87

    GunsNweights87

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    The hottest nato there is is ppu that I know of its 1200-1225 from a 4 inch


    Sent from my iPhone using Glock Talk
     
  6. cowboy1964

    cowboy1964

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  7. fredj338

    fredj338

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    Even in an 8" bbl, not raising 1250fps to 1400fps. Roughly 25-30fps plus per inch, so you get another 100-125fps, maybe.
     
  8. M 7

    M 7

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    Possibly so.

    Each barrel is basically a law unto itself meaning that velocities vary according to bore dimension (tighter/closer tolerances), propellant burn rates, projectile bearing surface, etc. I've got 9mm pistols with 4-inch barrels that produce higher velocities than 4.5- and 5-inch barrels chambered in 9mm using the same exact ammunition out of the same exact box/lot. So, until one runs a specific lot of ammunition from a specific gun and barrel across the chronograph, there is no "hard and fast" rule about how velocity will be effected. While generalities like "add 25 - 30 fps per additional inch of barrel length" seem reasonable, they frequently fail when actual velocities are measured. Take nothing for granted...
     
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  9. FullClip

    FullClip Native Mainiac CLM

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    Here's a Paul Harrell video on the Winchester White Box NATO where he runs it over his chrony. He got 8 FPS average over the advertised 1150 FPS. I bought 500 rounds of it a few weeks ago, but haven't shot any yet.


    View: https://www.youtube.com/watch?v=QntZr9PGET8
     
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  10. pochis

    pochis

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    I believe you on the 7 or 8 inch barrel but why when 99% of shooters are from 3 to5 inch barrels, really makes no sense to me why they would comfuse people in that manner.
     
  11. fredj338

    fredj338

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    Agree, all barrels are diff, just noting there is a rule of thumb & it pretty much follows those numbers. It is not unusual for manf to exaggerate or intentional use a barrel that gets highest vel because so many actually believe that is what they will get. After all, that's what it says on the box or web site? Chrono never lies.
     
  12. fredj338

    fredj338

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    And it will likely NOT be that in your gun.
     
  13. FullClip

    FullClip Native Mainiac CLM

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    Did I ever say you would get the same results?
    Did Paul say you would get the same results?

    Don't try it a home......
     
  14. fredj338

    fredj338

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    Just noting, many think because its on the internet it must be true??
     
  15. FullClip

    FullClip Native Mainiac CLM

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    Know what you mean, but think Paul is pretty honest in his videos.

    When things warm up in a couple months I'll try to remember to take my Chrony out with my M9 and post the results. I bought the ammo as it's supposed to be a little bit on the hotter side supposedly and my new M9 is a short stroker with Blazer Brass 115 stuff.
    I'll even try to turn around every shot and give the speed after every shot like Paul, even though the Chrony spits it out on the printer for me.
     
  16. rock185

    rock185

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    I've chronographed Winchester, SIG and IMI 124 grain NATO in various barrel lengths, and the published Magtech velocity seems very high. If I run across some Magtech NATO locally, I'll definitely buy some and chronograph it.

    Some Winchester, SIG and IMI NATO chronographed velocities for comparison:
    Nato in 4.7" Bbl: SIG = 1181FPS, WIN.=1203FPS, IMI = 1255FPS
    " " 16" Bbl: SIG = 1260FPS, Win. =1312FPS, IMI = 1350FPS
     
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  17. skyfall

    skyfall

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    I decided to order a case of Win.124gr. NATO to add to my reserve.I normally shoot AE 124gr. FMJ in my G45 and I want a little hotter ammo and this is at a good price.
     
  18. fredj338

    fredj338

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    Are you trying to match +p carry ammo? Otherwise, doesnt really matter.
     
  19. skyfall

    skyfall

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    The cost is the same online and I would rather have "hotter"ammo.I know it probably makes no difference,just personal preference as to what to shoot.