Gunsmithing Stretching the magazine length on a Remington Mod. 7/M700.

RonA

Sergeant
Full Member
Minuteman
Jul 10, 2011
664
389
69
Browns Valley CA
I'd like to be able to fit a slightly longer cartridge into my Model 7's standard magazine. Thinking about a 6.5MM TCU but the overall cartridge length will be longer than the standard .223 setup with the 95gr Vmax or 100gr Nosler BT's.
I figure if it could be stretched out around .2 to .25" it would allow me to set the bullets normally. Anyone done this before with any degree of success?

Thanks.
RonA
 
If you replace the factory mag with a detachable setup and run AICS 223 mags you can get the 6 TCU out to 2.5" long and it will feed without issue.

The other thing you might attempt if you're handy and good with tools would be to re-make that block in the back of the magazine that limits the length from 2.85 down to 2.3

A cleaner, easier solution is to replace the floor plate setup and put in an DBM that runs AICS mags, then put the 223 mags in there and roll on.