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Old October 7, 2013, 10:28 AM   #1
Panfisher
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A couple of questions

Since I have a little time on my hands I was looking as some of my "stuff" and noticed that my BX 25 mag for my Ruger 10/22 is about the same length as the 30 round mag for my AR, why? Seems like it would be a lot shorter since its a .22 LR. I will actually put a tape measure on it and see, it may just be the perspective that makes it seem close to the same.

Also sitting around thinking about cartridges I got to wondering why the 6.8 became the "go to" upgrade to the AR 15 Platform. Why go to the 6.8 instead of a .257 or even 6mm. Seems like the small cased of the .223/5.56 would do better with the smaller diameter bullet that a 6.8. still able to keep up the velocity and make a great medium game (deer) round. Is there a ".257 AR" type round? Playing around on my bench I sacrificed a few .223's to neck them up to .243, .257, .284, and even a .308. Gotta admit that the .257 one with a Nosler Ballistic Tip looks interesting. Just wondering.
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Old October 7, 2013, 12:47 PM   #2
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Quote:
my BX 25 mag for my Ruger 10/22 is about the same length as the 30 round mag for my AR, why?
The logical answer, is because that is how they are made and really don't have any relationship to each other. ....

Let me give you a better example. I own two after-market magazines for my Ruger MK-II. They have a capacity of 12-rounds and are the same length as the factory 10-round. When I disassembled them for cleaning, found that their internal spring construction was different and allowed more room for shells. That's just the way of it ...


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Old October 7, 2013, 01:29 PM   #3
Rikakiah
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My 20 round mags for my Walther/HK .22 416 are identical in size to a standard 30 round AR magazine. The follower is longer than I think it possibly needs to be and it has a piece that allows you to pull the spring down from the outside for easy loading, but it still feels like they could've designed it to carry 30. I think the random "that's just the way it is" is probably about the most accurate answer.
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Old October 7, 2013, 04:37 PM   #4
Panfisher
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That's pretty much the only answer I could come up with also.
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Old October 8, 2013, 03:16 AM   #5
Tejicano
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" BX 25 mag for my Ruger 10/22 is about the same length as the 30 round mag for my AR, why?"

The 22LR magazine is single stack while the 5.56 magazine is staggered.

The 6.8X43mm case is based on the .30 Remington case (base dia - 0.421 inch) so the base is a bit wider than the 5.56X45mm case (base dia - 0.377 inch).

The 6.8X43mm round was developed to push a heavier bullet at a decent velocity out of a carbine built on a standard AR lower. It was also designed to optimize performance out of shorter barrels. It does not loose much velocity out of a 14.5 inch barrel compared to a 20 inch barrel.
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Old October 8, 2013, 11:07 AM   #6
Panfisher
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AHH the .22LR explanation makes perfect sense now. Thanks
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Old October 8, 2013, 08:21 PM   #7
jmr40
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Rimmed cartridges don't feed as well in a double stack magazine. I've seen a few. I have a couple of Ram-Line 30 round magazines for 10-22's that are about 1"-2" shorter than the 25 round Butler Creek mags. They work most of the time, but I get the occasional jam. The single stack Butler Creeks have never failed me.
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Old October 9, 2013, 11:13 AM   #8
Jim243
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The BX-25 I believe is a single stack mag (22LR) and the 30 round AR mag (223/5.56) is a double stack.

Jim
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Old October 10, 2013, 09:27 PM   #9
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lol, i just said the same thing to my buddy today. he had his 25 round ruger mag and i had my 30 ar mag. i said the exact same thing.....
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Old October 11, 2013, 12:43 AM   #10
Justice06RR
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I've had a Champion 30rd 10/22 mag that is about an inch shorter than the BX mags, but it was a jam-o-matic. I'd get a FTF every single time I used that mag, but not on the BX mags. 22lr is better in single-stack mags, and factory Ruger mags are the best.
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