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  1. #1
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    open tip vs FMJ bullet accuracy

    Reading an article on GunsAmerica Digest, found in my inbox this a.m.
    " Tested: Winchester USA Ready Ammunition "

    https://www.gunsamerica.com/digest/w...dy-ammunition/

    in the article, a statement is made that it uses a "open tipped range bullet ".. that
    "delivers greater accuracy than full metal jacketed bullets "

    No doubt, Winchester knows a lot more about bullet accuracy than I do , but in my mind, I'm wondering ..
    why would a open tip bullet give greater accuracy than a closed tip (FMJ) bullet ?

    didn't Nosler develop the ballistic tip for their hp bullets, for improved accuracy ?

    Ideas ?

  2. #2
    MGO Member Ol` Joe's Avatar
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    Hollow points are basically a cylinder of lead with a lighter weight jacket that gives a good BC to the bullet and they keep their center of gravity to the rear which aides accuracy. You’ll note almost all match bullets are hollow point design and the tipped ones are actually hollow points too simply with a light weight tip fitted in the front section of the cavity.
    Lots of writings on the web on the subject
    "Saepe errans, numquam dubitans --Frequently in error, never in doubt".

    The trouble with the Internet is that it's replacing masturbation as a leisure activity. ~Patrick Murray

  3. #3
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    Adding to what Ol'Joe said, the Meplat of a projectile has a notable effect on ballistics and BC of said bullet.
    I shoot with F Class and BR guys that get down in inspect every single one and go into long scientific and philosophical debates about uniforming them before loading.
    I can, in no way, shape or form, not by any far stretch of the imagination outshoot a slightly jacked up (technical term) meplat, so I stay well and clear of those conversations, but it's always good bench racing between them.

    Brainfood:
    https://en.wikipedia.org/wiki/Meplat

    https://www.ballisticstudies.com/Kno...allistics.html

    If you're truly bored and want to go further down the wormhole, the topic is regularly discussed at Accurate Shooter.
    https://bulletin.accurateshooter.com/tag/meplat/

  4. #4
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    Thanks, Ol' Joe.."they keep their center of gravity to the rear which aides accuracy"
    that was the one possibility I considered, that would make sense.

    Thanks for the links, Quads.. made for some interesting reading..&
    enjoyed reading about Elmer Keith's beliefs, on bullet design.

    looked @ this..briefly https://bulletin.accurateshooter.com/tag/meplat/
    I was impressed by the "Daily Bulletin ' of Accuracy shooter.. thought I better step away from that wormhole..

  5. #5
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    Quote Originally Posted by joepistol View Post
    ..... I better step away from that wormhole..
    At first blush, it's only 578 pages of wormhole......


  6. #6
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    The first thing to know is that the very small HP in a rifle match bullet is completely different than an HP meant for defense in a handgun. You want the base of the bullet to be concentric so that the entire circu****ence leaves the barrel uniformly. If it's slightly off, the gases escaping can slightly knock the bullet off of true. This is easier to do with a bullet with no lead exposed at the base. The purpose of adding a plastic tip to the hollow point in front is to increase the length of the bullet for its weight. This increases the BC of the bullet, allowing for less velocity loss and less susceptibility to wind drift. That's why you see heavy for caliber bullets used in longe range shooting. The bullet drop is a constant and can be easily compensated for, but wind drift is a changeable and should be minimized.

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