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300 BLK mags

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tombogan03884:
I know Les answered this for me before, but darned if I can find it.   ;D

Bought 30 rd AR mags.  Curve is wrong for the 300 cartridge , so they're basically cool looking 5 rounders.        :(

Should I have just bought 20 rd mags ?
Or does some one make 300 specific mags ?

Thanx   ;D

PegLeg45:
I've been considering building out a .300 on a spare receiver and wonder this as well.
When the .300 Blk first came on the scene, all the "experts" said one of the advantages was mag compatibility.

tombogan03884:
The taper is different so they don't stack the same.   >:(
As well as wider so mag capacity is a bit lower as well.

alfsauve:
See if I can get Kevin to respond he loves his .300.

Slight different animal, but I use straight, metal 20 rounders for my .458.  Did replace the follower with a single stack one.  Not really necessary but heads off any feeding problem with the last round.   

tombogan03884:

--- Quote from: alfsauve on November 28, 2021, 07:44:34 AM ---See if I can get Kevin to respond he loves his .300.

Slight different animal, but I use straight, metal 20 rounders for my .458.  Did replace the follower with a single stack one.  Not really necessary but heads off any feeding problem with the last round.

--- End quote ---

That's what I plan on pending other suggestions.
One issue I have is I want to keep 300, and 5.56 unmistakably separate.
Right now I have metal for 5.56, and polymer for 300.

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