Purchased 2 MDT CIP (3.850") Metal Mags for BF sale for my 300PRC build on LA Origin in M700 LA Bravo w/ W3 Forend. Both mags fit in and locked up tight but wouldn't feed.
Figured there was a problem so removed barreled action from Bravo inserted a mag into chassis and noticed that the mag was not seated flush with both the front/rear chassis relief grooves.
Checked the inside of magwell and noticed a slight burr at front of magwell caused by front lip of mag while trying to insert it. Used a machinists file and removed the burr. Inserted mag and it still wasn't seated flush.
Loosened triggerguard screw (blue arrow in photo below and slid triggerguard rearward as far as it would go) reinserted a mag and this time it seated flush with bottom of the relief grooves. (Red arrows in photos below). Tightened screw with mag inserted and reinstalled barreled action to test. That 1/8" was all that was need to ensure proper function. The mags insert, feed, and drop freely with no excessive wobble/movement.
So if feeding issues with a Bravo, make sure that TG is in rearward position before you start bending the heck out of your feed lips and or smacking that mag in hard with your palm. I guess this holds true with most actions/chassis/ stocks. Make sure mag lips are flush with top of mag well and or bottom metal. If the feed lips are more than several thousands difference across from front to back they may need some adjustment but more important to check proper seating first. Lightly sanding with fine emery on inside edge of feed lip also helps to prevent scratching of your brass.
** Also, if you install a spigot on the Long Action M700 Bravo, make sure that the front action screw has two washers before you re-install plastic to capture it.
TM6
Figured there was a problem so removed barreled action from Bravo inserted a mag into chassis and noticed that the mag was not seated flush with both the front/rear chassis relief grooves.
Checked the inside of magwell and noticed a slight burr at front of magwell caused by front lip of mag while trying to insert it. Used a machinists file and removed the burr. Inserted mag and it still wasn't seated flush.
Loosened triggerguard screw (blue arrow in photo below and slid triggerguard rearward as far as it would go) reinserted a mag and this time it seated flush with bottom of the relief grooves. (Red arrows in photos below). Tightened screw with mag inserted and reinstalled barreled action to test. That 1/8" was all that was need to ensure proper function. The mags insert, feed, and drop freely with no excessive wobble/movement.
So if feeding issues with a Bravo, make sure that TG is in rearward position before you start bending the heck out of your feed lips and or smacking that mag in hard with your palm. I guess this holds true with most actions/chassis/ stocks. Make sure mag lips are flush with top of mag well and or bottom metal. If the feed lips are more than several thousands difference across from front to back they may need some adjustment but more important to check proper seating first. Lightly sanding with fine emery on inside edge of feed lip also helps to prevent scratching of your brass.
** Also, if you install a spigot on the Long Action M700 Bravo, make sure that the front action screw has two washers before you re-install plastic to capture it.
TM6
