Here’s a quick post showing how we converted a Remington 7600/7400 long action magazine for use in a Savage 110/111 (long action). The 10 round metal Remington magazines can be found at outlets like Cheaper Than Dirt at about half the cost of a factory 4 round magazine. This can save you quite a bit of money since the OEM Savage 4 round magazines cost anywhere from $40-$50!
Here are the tools that I used:
.060″ diamond burr
1/2″ sanding drum
.090″ drill bit
Tap or small center punch
Small sharp scribe
Small flat screwdriver
Needle nose pliers
small ball-peen hammer
(If you have access to a milling machine this project would be a breeze)
Locate the magazine catch slots on your Savage magazine
Measure carefully and scribe their location onto the Remington magazine, center-punch and drill .090″ holes at the extreme corners of the mag catch slots.
Remove the metal between the holes with the Dremel .060″ diamond burr. Do both sides.
Slightly bend the tab out with the flat screwdriver and finish the bend with the needle nose pliers, compare to your Savage factory mag.
Remove the excess feed lips from the Remington mag with the Dremel sanding drum, duplicating the profile of the Savage mag. Be sure not to damage the follower.
To make things easier, you can hold the follower out of your way by depressing it into the magazine and inserting a small screwdriver through the large slot in the side of the mag.
Wipe off any visible dust and shavings and test fit the magazine in your rifle.
You will probably need to angle the top of the magazine box inward to get the magazine to insert completely and the button catch to snap into place.
Use the ball-peen hammer and tap the top/sides softly until they match the Savage mag profile and can be seated completely into the rifle.
Once it’s finished, deburr everything and clean the magazine out well.
Cycle the action with cartridges in the magazine to be sure you don’t have any feed issues. Use touch-up bluing to protect the exposed metal.
This project took about an hour to complete.