Does the 7N6 round in 5.44x.39 cause more damage than a .308??

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Originally Posted by vicious_cb

Thats not even the article I was referencing. I have go to find the magazine but they were getting something like a G1 of .370 which is heavy OTM BCs out of a light 53gr bullet which is pretty impressive. No one is arguing that 7n6 is better than the 5.56 match loads out there but that 7n6, compared to its contemporaries had some pretty impressive performance for its time.

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I see low .3s published but even then, if we assumed .370 was the norm, the round is slower and that negates BC advantage. Resulting performance is the same as far as exterior ballistics are concerned. Nothing special about 5.45. It’s just a 5.56 from a different part of the world.


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Originally Posted by Firefly

It's all good. You have a point. If I had a 5.45 drop chart I would post it. But unfortunately I do not.

I do agree they are quite similar and likely by design on behalf of the Russians to keep ballistic parity with the West.

I would reckon they have some kind of 5.45 progress but those rounds are simply unobtainable in the West and are unknown variables (at least where we are concerned)

If anyone has more knowledge on their current rounds, it would be interesting

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I did post the drop chart ;)

That’s why I was inquiring how much flatter people were claiming with 5.45. The numbers are indistinguishable. Any perceived “flatbread” with 5.45 AKMs va an AR can be attributed to the AR’s height over bore rather than actual trajectory. That’s why I set them both the same with the ballistic calculator. When we shoot 7N6 out of the 5.45, it’s got just a bit more drop than the 5.56 rifles with 14.5” barrels. The 5.45 AR is a 16”. They are sighing four inches of each other at 300.


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What's the ballistic coefficient of a Colt 6920 with the bolt locked back and chained to a radiator heater?

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Originally Posted by Iraqgunz

What's the ballistic coefficient of a Colt 6920 with the bolt locked back and chained to a radiator heater?

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:D:D:D. Let me get out my calculator.

shiv,

The image wasnt showing up for me.
Now it is.

Is that from an app? If so where can I get it?

Thanks

It’s the Ballistic app.


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Originally Posted by shiv

It’s the Ballistic app.


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I see. Thanks again

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Originally Posted by shiv

Nothing special about 5.45. It’s just a 5.56 from a different part of the world.

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Bottom line: The 5.45 is a .222 Remington with an unusual (to us) bullet.

Military Arms Channel did an informal test using steel jacketed lead core bullets shot into a tree; .308, 7.62x39, 5.45x39, and 5.56. Only the 5.45x39 penetrated the larger tree trunk in his first test out of the four calibers. It wasn't even steel core, all the rounds used for the test were Russian steel cased civilian ball ammo. Velocity of 5.45 53gr 7n6 is 2900FPS from a 16" barrel which is close to the 5.56 55gr UMC 2943FPS out of a 16" barrel. Where 5.45 shines though is at distance, since it's designed to tumble no matter the velocity.

https://www.youtube.com/watch?v=547BKysByqM

I love 5.45x39 and was and am still very upset about the bs 7N6 ban. It has the same construction as SS109 which is specifically blessed as OK. It is like they decided, hey how can we make exercising your rights more expensive??!! I know!! ban affordable and effective ammo!!

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Originally Posted by 7n6

Military Arms Channel did an informal test using steel jacketed lead core bullets shot into a tree; .308, 7.62x39, 5.45x39, and 5.56. Only the 5.45x39 penetrated the larger tree trunk in his first test out of the four calibers. It wasn't even steel core, all the rounds used for the test were Russian steel cased civilian ball ammo.

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The ammo used in that video must have been pretty poor.
Army manuals say that 30/06 M2 Ball will penetrate 36" of oak at 200 yards. M80 308 ammo is similar. I've shot through oak similar in diameter to that maple with 7.62x39 Chinese ball.