5.56 mag that can handle the longest COAL?

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[ARCHIVED THREAD] - 5.56 mag that can handle the longest COAL?

Posted: 5/16/2015 11:20:12 PM EDT

I am working on loads with the new 77 gr TMK but am having issues with seating depth. I would like to not have to seat the bullet as deep in order to fit in the mag. Does anyone know which mag offers the longest COAL? I here ASC mags can fit considerably longer rounds, but they don't run well in my lower.

Posted: 5/17/2015 1:16:04 AM EDT

[#1]

I would think that USGI mags can handle the longest COAL out of all the available options.

Posted: 5/19/2015 10:12:56 AM EDT

[#2]

USGI 30 rounders are a little too tall for shooting prone for me. I ended up ordering some PRI gen 3 mags that are advertised to take rounds up to 2.310". The older gen 1 mags apparently allowed for 2.320" so I will be on the lookout for those.

Posted: 5/19/2015 10:46:17 AM EDT

[#3]

I run the ASC mags...

Posted: 5/20/2015 11:32:03 AM EDT

[#4]

Hi,

CPD Inc. stainless steel 5.56 30 round magazines run 2.31"

Thanks

Posted: 5/20/2015 12:22:52 PM EDT

[#5]

Quote History

Quoted:
I would think that USGI mags can handle the longest COAL out of all the available options.

View Quote

I have just the opposite experience. USGI mags have the shortest allowance for COAL. At least, the D&H mags I have.

I find the straight bodied 20 round Pmags to be VERY generous.

Posted: 6/1/2015 12:51:44 AM EDT

[#6]

So I tried a PRI mag, and it won't fit in my lower. Looks like it is too wide at the front.

Posted: 6/1/2015 1:02:18 AM EDT

[#7]

Cut or mill a slot in the front of a GI mag to extend cartridge overall length.

Posted: 6/9/2015 10:10:35 PM EDT

[#8]

ASC mags are too short. A round loaded to 2.310 doesn't come close. It appears the max is around 2.270. Disappointing because I happen to have a ASC 6.5 grendel mag and a round loaded to 2.310 goes in just fine.

I did modify the PRI mag so it goes into the lower, but it's not ideal. I can still try an elander and HK maritime mag.

Posted: 6/9/2015 10:11:28 PM EDT

[#9]

Quote History

Quoted:
Cut or mill a slot in the front of a GI mag to extend cartridge overall length.

View Quote

I may give that a try. This rifle will be used in DMR matches so I want to minimize the effect on reliability as much as possible.

[ARCHIVED THREAD] - 5.56 mag that can handle the longest COAL?

AR-15 » Magazines

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