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Posted: 8/20/2016 11:19:06 AM EDT
I've been happy with PPU's 308 offering in terms of plinking ammo. It's reasonably accurate and not much more expensive than ZQI. This week I went looking for more and found that just about all outlets are now offering their "M80" clone instead of the 308. Midway actually lists their 308 Win FMJ as "discontinued." There's still some places with 308 in stock, but it is more expensive than the M80.
Here's the question...are these the exact same rounds with a different box and headstamp? Does anyone have experience with both and is the accuracy about the same? Point of impact the same? If so I'll pick up the M80. Here's what I got from www.ppu-usa.com 
So there's a minuscule .002 difference in BC, but absolutely everything else is the same? |
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Posted: 8/20/2016 1:01:23 PM EDT
[#1]
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension.
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Posted: 8/20/2016 8:11:44 PM EDT
[#2]
Quote HistoryQuoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. Sure, but why isn't it reflected in the numbers above? I understand they are different specs thus the question... |
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Posted: 8/20/2016 8:50:12 PM EDT
[#3]
Quote HistoryQuoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. This. Typically...7.62x51 ammo has a different powder spec, a spec more suitable to gas action SA rifles, a powder with a specific port pressure, using that port pressure to function the semi auto / full auto rifle within its design parameters. Sooooo... while on paper .308 and 7.62x51, "appear" to be the same.... most likely they are not. Even Fed. Gold Medal Match has 2 loads 175gr ammo.... a 7.62x51 load and a .308 GMM load. I doubt its accuracy through your rifle will be the same. |
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Posted: 8/20/2016 11:37:55 PM EDT
[#4]
Quote HistoryQuoted:
Sure, but why isn't it reflected in the numbers above? I understand they are different specs thus the question... Quote HistoryQuoted:
Quoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. Sure, but why isn't it reflected in the numbers above? I understand they are different specs thus the question... Barrel Length difference. |
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Posted: 8/21/2016 11:07:01 AM EDT
[#5]
Quote HistoryQuoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. nope cup is not psi. they are basically the same do some research |
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Posted: 8/21/2016 11:35:29 AM EDT
[#6]
Quote HistoryQuoted:
nope cup is not psi. they are basically the same do some research Quote HistoryQuoted:
Quoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. nope cup is not psi. they are basically the same do some research I didn't say unsafe, I said different. The measurements are different and my past research suggests to treat 308 on the higher side, especially with older NATO spec chambers. http://forums.gunboards.com/showthread.php?945-FAQ-Difference-between-308-amp-7-62-X51-%28NATO%29 |
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Posted: 8/21/2016 3:20:57 PM EDT
[#7]
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I didn't say unsafe, I said different. The measurements are different and my past research suggests to treat 308 on the higher side, especially with older NATO spec chambers. http://forums.gunboards.com/showthread.php?945-FAQ-Difference-between-308-amp-7-62-X51-%28NATO%29 no, you said higher pressure for the 308, its not. even with the "nato chamber" btw both "cites" for that thread are BS, especially the 1999 emails. They have been debunked with actual test and direct measurements. |
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Posted: 8/22/2016 12:06:47 AM EDT
[#8]
Quote HistoryQuoted:
no, you said higher pressure for the 308, its not. even with the "nato chamber" btw both "cites" for that thread are BS, especially the 1999 emails. They have been debunked with actual test and direct measurements. Quote HistoryQuoted:
Quoted:
I didn't say unsafe, I said different. The measurements are different and my past research suggests to treat 308 on the higher side, especially with older NATO spec chambers. http://forums.gunboards.com/showthread.php?945-FAQ-Difference-between-308-amp-7-62-X51-%28NATO%29 no, you said higher pressure for the 308, its not. even with the "nato chamber" btw both "cites" for that thread are BS, especially the 1999 emails. They have been debunked with actual test and direct measurements. Fair enough, I'll take your word for it. So I don't pass this along again, where should I cite? |
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Posted: 8/22/2016 9:45:31 AM EDT
[#9]
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I doubt its accuracy through your rifle will be the same. Well that's a bummer. Guess I'll try a box and see what happens. |
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Posted: 8/22/2016 1:13:31 PM EDT
[#10]
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Fair enough, I'll take your word for it. So I don't pass this along again, where should I cite? there is a faq in the variants forum |
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Posted: 8/22/2016 8:04:44 PM EDT
[#11]
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there is a faq in the variants forum Quote HistoryQuoted:
Quoted:
Fair enough, I'll take your word for it. So I don't pass this along again, where should I cite? there is a faq in the variants forum Posted so others can learn http://www.ar15.com/forums/t_3_121/413443_.html |
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Posted: 8/22/2016 11:59:05 PM EDT
[#12]
I should pick up some M80 PPU to chrono side by side with the ".308" I have,
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Posted: 8/25/2016 9:41:54 AM EDT
[#13]
Quote HistoryQuoted:
I should pick up some M80 PPU to chrono side by side with the ".308" I have, Please do! |
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Posted: 8/26/2016 10:32:17 PM EDT
[#14]
Chrono tomorrow, but from the initial pulldown the .308 has .7gr more powder, but the .308 lot is 3yrs old |
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Posted: 8/27/2016 2:33:37 AM EDT
[#15]
Quote HistoryQuoted:
nope cup is not psi. they are basically the same do some research Quote HistoryQuoted:
Quoted:
M80 in 7.62mm NATO spec. 308 Win is not. They would have to be different. 308 is higher pressure, different dimension. nope cup is not psi. they are basically the same do some research 308 and 7.62X51 are almost exactly the same. Reload and you will see this very easily. |
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Posted: 8/27/2016 7:48:31 AM EDT
[#16]
Quote HistoryQuoted:
Chrono tomorrow, but from the initial pulldown the .308 has .7gr more powder, but the .308 lot is 3yrs old 308 have more powder, 7.62N has less case capacity |
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Posted: 9/4/2016 2:30:30 PM EDT
[#17]
Ran 10 rounds of each on the same day. As far as in my M1A, both loads performed almost identical.
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Posted: 9/4/2016 6:19:28 PM EDT
[#18]
Awesome. Thanks for doing this!
I'm impressed with the consistency out of both loads. The fact they were within 2 fps between the two is evidence enough for me that PPU was going for "identical" performance. They should produce similar accuracy and POI. Ordering up a case of that M80... |
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