Ammunition integrity during firing process.

Discussion in 'General Sako Discussions' started by Devareaux, Jun 25, 2021.

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  1. Devareaux

    Devareaux Active Member

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    I have posted the World Congress of Engineering paper, I also posted the Hornady Study, I also posted the study that Erik did at Berger Bullets about everything I have brought to the thread. But no one is quoting those links, because they aren't here to discuss bullet integrity, they are here to simply be argumentative. This is the general discussion forum, which is the proper place to generally discuss Sako related information, and if Bullet Integrity isn't related to a Sako owner and his firearm, I don't know what is.


    This isn't a pissing contest or a thread about physics, no one cares who knows more about physics, I'm sure there are engineers here that would put everyone to shame about their knowledge of physics. This is a thread about bullet integrity and posting information regarding this, you don't have to know physics to do this, just be a participant. And I've had multiple people show up to my thread only to protest the fact that I'm posting in the first place on a matter they wish not be on the forums, ,well too bad so sad, they aren't the thread Gestapo and I won't be disrespected by authoritarians. Sounds pretty Anti- Free speech to me. I actually expected better behavior from the members here at SCC.

    (https://forum.accurateshooter.com/threads/berger-bullet-failure-test.2481280/)
    Proceedings of the 'World Congress of Engineering'"(http://www.iaeng.org/publication/WCE2010/WCE2010_pp1444-1447.pdf)
    (https://www.thefirearmblog.com/blog/2015/10/29/hornadys-big-announcement-eld-x-heat-shield-tip/)
    (https://kestrelmeters.com/pages/g1-g7-ballistic-coefficients-what-s-the-difference)

    "The SR-71 would get blisteringly hot. This was not due to “friction” with the air as is often claimed, but due to compression of the air. In effect, the SR-71 was a bloody great hammer smashing air molecules; since it was moving three times the speed of sound, the molecules simply could not flow out of the way and instead were compressed to many times normal density and shoved out of the way. The compression occurred quickly enough that the heat built up in the process could not radiate away, and instead was conducted to the skin of the plane.


    Interestingly, the hottest part of the plane – apart from the engines – was the one part that the engineers and pilots most wanted to keep cool: the cockpit.
    "
     

  2. Devareaux

    Devareaux Active Member

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    I'll try to get some visuals for those that would like to see some of the things I'm talking about here. So you don't have to sift through the jargon.


    Small varmint round


    Larger round doing the same thing.

    The people on this thread saying that heat can't act upon a bullet quick enough to impact the integrity of the bullet, do not understand the more complicated matter of heat transfer under pressure. Most of the people on this thread have had great information to relay, and they deserve the information to best be prepared for a proper hunt, and for proper ammunition down the barrel of their Sakos. If even one person here benefits from this information, then this thread was a success.

    If anyone has anymore relevant information, please continue to post. Because bullets aren't getting any cheaper, and I would want us all, even the trolls, to benefit from making sure that we have the best bullets going through our barrels to get the job at hand done!

    Godspeed everyone.

    EDIT: Info on the 7mm round.


    Ballistic Coefficient: .625
    Sectional Density: .287
    Velocity: 2300-??? (Depends on powder loads)
    Range: 3000
    Twist Rate: 1-9" Or faster

    (https://www.hornady.com/bullets/eld-x#!/)
    "Best-in-class BCs
    Verified by Doppler radar, the Heat Shield® tip is immune to the effects of aerodynamic heating and retains its shape to maintain the highest-in-class BC over its entire trajectory."
    (These are the new ELD-X series to replace the A-Max)

    Again these are the A-Max series bullets by Hornady that they eventually replaced with the ELD-X series due to problems found in the old bullets due to heat. Hornady did a study that I posted earlier, and they concluded that indeed the tips were melting, and it was affecting their bullets under certain conditions(not only were the tips melting, but the compression of air was heating the lead, and they basically vaporized). Not only was their tips melting, but every major brand of High Ballistic Coefficient bullets tipped with these polymers were melting under these conditions.

    As you can see, the A-Max series was another high Ballistic Coefficient round, affected by these heat issues. And every manufacturer has noticed this phenomena and yet they never changed the recommended velocities, so the twist rates and the impending rotations really didn't have much to do with anything, or else they would have simply reduced their recommendations. Instead they beefed up the polymer tips, and I'm not sure if they beefed up the copper walls or not, I'll have to see. But everything Hornady changed in their new series of bullets, were to protect against these heating issues.
     
    Last edited: Jun 30, 2021
  3. paulsonconstruction

    paulsonconstruction Sako-addicted

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    The OP seems to be an obsessed individual that is hell bent to get everyone to tell him he is correct in every way. If they don't he launches an attack on them. PLEASE, SOMEONE SHUT THIS THREAD DOWN!!!!! This is the most ugly thread I have ever seen on this forum and the OP is the one responsible for it. This will be my last post here & I hope EVERYONE else's as well.
     
    sraaw and CerebralDistortion like this.
  4. Devareaux

    Devareaux Active Member

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    You're off topic, why don't you comment on the videos I posted about the bullets disintegrating sub 25 yards. This isn't an ugly thread, you're just an ugly person. Stop posting, you'd be doing us all a favor.
     
  5. Spaher

    Spaher Well-Known Member

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    "Silence, when nothing needs to be said, is the eloquence of discretion."
     
  6. stonecreek

    stonecreek SCC Secretary Forum Owner SCC Board Member

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    Not sure who is the troller nor who is the trollee, but it does seem that this thread has gone beyond the bounds of the latitude we subscribe to on this forum. Sine die.
     
    FLT and icebear like this.
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