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11/20/2019 5:07:11 PM
Posted: 8/1/2009 6:23:24 PM EST
Well, I've been building up my AR15 collection to new heights, lately...

As of now, I have three uppers. Two from Spikes (a .22 and a 5.56mm), and the .410 upper that Turkish company is putting out. I have magazines for the .22 and 5.56mm, but I only have one for the .410 (they should be more imported by the end of August).

Now, I'm really not in the mood to get more magazines for another upper. I also figured I wouldn't want a caliber that works with the .22 or .410 magazines, so my platform is the 5.56mm one.

I have been looking at big-bores, and from what I read, either the .50 Beowulf or .458 SOCOM will work with 5.56mm magazines (I read that PMAGs using .458 will need to be modified, for whatever reason; if this pertains to metal magazines, as well, please let me know). I liked both, but have been leaning towards the Beowulf lately. Are there any other calibers that work with these magazines?
Link Posted: 8/1/2009 6:31:31 PM EST
Link Posted: 8/2/2009 2:31:01 AM EST
Some report being able to use .50BEO in unmodified 5.56 mags, while others have said they need to tweak the feedlips a bit. ~6 rounds of 7.62x39 will work from an unmodified 5.56 mag.
Link Posted: 8/2/2009 12:57:55 PM EST
I've never had to modify magazines to get them to work with my .50 Beowulf. Including PMags.

I have been shooting the 325gr Speer HP bullets so keep in mind that other bullets may have different results.
Link Posted: 8/2/2009 3:28:06 PM EST
I have been using 20 and 30 round p mags with no modification for my 458 socom . 300 grain hollowpoints I also have been using 20 round 30 round and a 10 round 5.56 metal mags with no mods.
Link Posted: 8/2/2009 8:39:28 PM EST
Originally Posted By Cold:

338 specter Spectre I THINK does, but need someone to confirm this.


Requires 6.8 SPC mags

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