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Old 02-21-2019, 06:57 PM   #1
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Question Winchester white boxes 9mm

I've read several posts, actually quite a few, about people having problems shooting WWB's of ammo plus it being dirty. Is this the same ammo as the Winchester 9mm Nato ammo?

I bought 1000 rounds of the Nato 9mm and it came 20 white boxes of 50 rounds in a new steel ammo box. This ammo is a little hot but it functioned great in striker fired guns and was clean as any other brand.

I was just wondering if this is 2 totally different types of ammunition? Several striker fired gun owners manuals recommend shooting Winchester Nato ammo for the break-in period. Thanks,

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Old 02-21-2019, 08:13 PM   #2
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The NATO ammo is different from the "white box". Winchester has several versions that marketed in a white boxes. I believe the one designated as "target" is what's considered "white box". I presume it uses lower cost components and a more economical production process, it's usually cheaper. I'm thinking some of the faithful here can be more specific.
I get the NATO version and like it alot, and yes it seems to be a little hotter and fairly clean. There is a European standard for manufacturing cartridges, I can't recall the name. Most firearms made in Europe are designed around those cartridges. I believe there are more options manufactured overseas that would meet the NATO specs.
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Old 02-21-2019, 08:44 PM   #3
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Pic of WWB 9mm. The NATO looks like it comes in a white box also but it says "NATO" right after 9mm.
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File Type: png WWB.png (331.4 KB, 9 views)
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Old 02-21-2019, 08:51 PM   #4
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Jim, I have shot quite a bit of WWB with no trouble. I did find it to be a little dirty but this was back when ammo, powder, was hard to get. It seemed they were using any power they could get even floor sweeping. Talked to a Windchester Rep. he said the ammo is cleaner now. Enjoy.
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Old 02-21-2019, 09:01 PM   #5
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To the best of my understanding anything labeled "NATO" is loaded to a military standard and is a little hotter than the "street" load with the same bullets. This seems to apply to 9mm and the 5.56 (.223) rifle ammo as well. I'm sure others here can speak more to the rifle ammo than I can.

My shootin' buddy and I shot some NATO 9mm through his little Sig pocket gun and it was an eye opening experience. There is a difference. Sort of a FMJ +P. I don't know if they are +P but they feel like it.
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Old 02-21-2019, 09:20 PM   #6
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HK recommends the 9mm Nato for break-in. They, H&K, says the Nato ammo is actually a light +P and therefore recommended for the spring break-in in all their firearms.

Jim D
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Old 02-22-2019, 04:13 AM   #7
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I've used WWB 9mm almost exclusively since the 80's with no issues! I have also used S&B and would buy it too if the price were right!
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Old 02-22-2019, 05:08 AM   #8
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My understanding is the same as Cousin Mark's. My further understanding is that the NATO is still a target round but steered more for practice as a cheaper alternative to practicing with expensive SD ammo, but I'm less certain on that.
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Old 02-22-2019, 09:01 AM   #9
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Win NATO is loaded to a higher pressure and corresponding higher velocity than target. 124gr- 1200fps vs 1140fps

Either will work in a properly functioning firearm.
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Old 02-22-2019, 11:53 AM   #10
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9 mm standard pressure is 35000PSI, +P is 38000PSI and 9mm NATO is 36000 PSI. So the NATO rounds are a little hotter than a standard pressure, but not a full +P.
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