Rem700 Mag Options for .223

[BigDog00]

I'm putting together a .223 trainer based off the 700 footprint. My action is cut for a wyatts extended box (Bighorn SR3). I've been trying to figure out what my options are for the best/longest OAL. Wyatts has an internal box that goes 2.430, but I'd like to be closer to 2.50 if possible. I know I can go DBM and get there with an ACIS style mag. I've heard of pulling/modifying the spacer in the factory internal magazine but not sure if that's an option with the Wyatts (I can't find a factory mag box). My stocks inlet is for BDL floorplate but I can get it opened up to M5 if needed.

I'm leaning towards .223 AI chamber if that makes a difference. What other options are out there?

 

[83cj-7]

I have a bunch of experience with this issue working with 6x45. You can absolutely cut out the spacer on the Wyatt’s and move it back. The follower will float a little bit but feed okay.
Hands down the best way to feed a long 223 based cartridge is with a Hawkins Hunter magazine. The MDT 10 round mags also feed really well if they lockup tight. Both mags feed AI rounds pretty darn well too. My MDT didn’t lock up real tight so I welded the latch and made it .040” longer (See last picture). It works perfect now.

These are 2.475” and feed flawlessly:


Same in a MDT: