Longest OAL in aics .223 mag?

[Boozer]

Building a fast twist .223 to shoot the big boys, 80's or 90's. I'd love to get some insight on who makes AICS mags that allow for the longest cartridge OAL. I called and spoke with accurate mag about theirs, and they indicated that if a fella was handy, theirs could be opened up to something like 2.57ish, but I'd prefer to hear it from you guys who have done this before.

I'd like to determine my max OAL first so that I can back off it a bit, load up a dummy round, and choose a reamer that let's me jam a bit, and have room to chase the lands as the throats wears.

 

[Rob01]

I use the MDT mags in my .223 and they can load out to 2.550". My 75 ELD-M load at .020" off the lands is at 2.435" OAL.

 

[supercorndogs]

My unmodified AI mags will hold 2.55.

 

[BobinNC]

Accurate Mags are 2.370" out of the box, but take them apart and a couple of minutes work with a round file or Dremel and presto they are easily 2.55". I very much like the metal Accurate mags over their plastic brethren, even though it takes a little work to make them long enough.......

 

[Boozer]

Accurate Mags are 2.370" out of the box, but take them apart and a couple of minutes work with a round file or Dremel and presto they are easily 2.55". I very much like the metal Accurate mags over their plastic brethren, even though it takes a little work to make them long enough.......

This lines up with what their technical help guy told me. Thank you.

curious what the MDT and AI mags are after modification? Also I doubt anyone has had the chance to try on one of Ruger's new .223 aics mag now that they have a .223 RPR. I hear without mod they are right at 2.5"

 

[BobinNC]

Accurate .223 Mag out of the box:



Accurate .223 Mag after modification. Not my picture, but a good illustration none the less. All the material removal is done on the front end only. I never heard about anybody bother modifying MDT or AICS .223 mags as they are already 2.50-2.55" long inside.