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Posted: 7/24/2013 4:58:16 PM EST
[Last Edit: 7/24/2013 6:39:25 PM EST by USAWeapons]
Im in a 15 max capacity state and I am trying to figure out how many rounds of .300 Blackout will fit into a concentional 2.23/5.56 NATO magazine.

10 Rounds .223 = ? .300 Blackout

15 Rounds .223 = ? .300 Blackout

20 Rounds .223 = ? .300 Blackout

30 Rounds .223 = ? .300 Blackout

I have used the 30 round magazines and then the 15/30 reducers from MagBlock.com for my 2.23 rounds (also glued and riveted as to not get any crap) but I want to build a .300 AAC and I'd hate to buy all new rounds/limiters.

Link Posted: 7/24/2013 5:03:12 PM EST
The mags will hold the same number of either round. 300BLK cases are (can) be made from 223/556 brass.
Link Posted: 7/24/2013 5:03:24 PM EST
[Last Edit: 7/24/2013 5:04:14 PM EST by bm3]
If the mag holds 15 223 it will hold 15 300blk
Link Posted: 7/24/2013 5:06:52 PM EST
[Last Edit: 7/24/2013 5:51:20 PM EST by bdawg998]
What they said and it's .223.
2.23 would be a measurement in inches, granted both of these measurements are inches but there is a difference.

Edited for clarity.
Link Posted: 7/24/2013 5:43:28 PM EST
Link Posted: 7/25/2013 3:07:08 AM EST
You can also shorten the 30 round mags.
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