22-250AI or 22 creed

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by 86alaskan, Feb 3, 2018.

  1. benchracer

    benchracer Well-Known Member

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    Parshal is comparing 22 Creedmoor and STANDARD 22-250 brass (unfired), not formed AI. I believe this accounts for most of the difference.
     
  2. benchracer

    benchracer Well-Known Member

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    Undermine credibility? Not making that claim. Undermine your argument? Yes! If you put 22-250 ammo in a 22 Creedmoor chamber, fire it, and out pops formed Creedmoor brass... OR You place 22-250 ammo in an AI chamber, fire it, and out pops formed AI brass, there is NO WAY that the end product is going to be materially different in function or performance.

    If the Creed and AI can both be formed in the same way, from the same brass, they are going to be equivalent in volume and performance.
     
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  3. parshal

    parshal Well-Known Member

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    Just to be clear, I've not argued anything good/bad/ugly about the 22 Creed vs other 22's. I have no experience with any others. I've just supplied my data that others can use make decisions and arguments. LOL
     
  4. benchracer

    benchracer Well-Known Member

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    I don't see your results with the 80 ELD/R26 as being out of line. RL-26 seems to develop initial pressure slowly, then the velocity gains become evident once sufficient pressure builds. I'm not really sure where the dividing line is, but I have seen that mag primers sometimes help in developing initial pressure.
     
  5. benchracer

    benchracer Well-Known Member

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    Fair enough...
     
  6. parshal

    parshal Well-Known Member

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    They are 100 fps faster than the 82 grain Berger. Obviously they have different bearing lengths but I've not spent any time trying to figure out why. The 80's were just real fast, surprisingly so.
     
  7. benchracer

    benchracer Well-Known Member

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    It wouldn't surprise me to learn that the ELD has a longer bearing surface than the Berger. That seems to be the norm for the two brands. I am thinking that a longer bearing surface (within limits) could play a role in getting R26 to pressure up. Not sure if I am making sense? Trying to think of a better way to phrase things and failing...
     
  8. parshal

    parshal Well-Known Member

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    I get what you're saying.
     
  9. 86alaskan

    86alaskan Well-Known Member

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    I get what you're after. Kinda like putting a hard crimp on a 454 over H110 so that it has a chance to build before pushing out the bullet. So the ELD has more surface, more initial resistance, thus more starting pressure. Probably helps the burn.
     
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  10. benchracer

    benchracer Well-Known Member

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    THAT's what I was trying to say! You did a much better job. Thank you!!
     
  11. venatic

    venatic Well-Known Member

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    When you fire a 22-250 round in a 22 Creedmoor not only is shoulder blown out but also the case walls as well..... so it’s like an ackley ackleyed.:)
    I have friends with fast twist 22-250AI’s and they like them but they run 100 fps or so slower with all else being equal to the 22CM. Now my friends with 22/243AI and 22/6mm can get a tad more than the 22CM if they push’em.
     
  12. Creedmoor shooter

    Creedmoor shooter Well-Known Member

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    Not calling anyone out, but I'm having a very hard time believing a 22 creed is 100 fps faster than a 22-250 AI. The AI has the edge with capacity. It doesn't make sense that the 22 creed would out run it. I think you'd find that If you ran both to full tilt that the 22-250 AI would be a tad faster. As big of a fan as I am of the creed case design, I'm not gonna say something that simply isn't true.
     
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  13. desertcj

    desertcj Well-Known Member

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    Doesn't sound like or look like a 22-250 Will headspace correctly in a 22 Creedmore chamber? Obviously, the gun goes bang but the picture posted earlier even looks like the case has the start of head separation. Stretching in the web...
     
  14. parshal

    parshal Well-Known Member

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    That's one shot with a light load. There's no stretching there.