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Alpha Mags

My type 1's work flawlessly.

See below, copied direct from their website:


One of the most popular platforms for the addition of a DBM system is the Remington 700 short action. It is important to understand
the limitations of any box magazine with this action. The Alpha Type 2 magazine is designed without a spacer plate. This magazine
works best with actions that have been modified to accept longer projectiles. Most gunsmiths will relieve or notch the feed-ramp of
the action to ensure proper feeding of the magazine. This will ensure the tip of the projectile does not hang up on the underside of the
feed-ramp and cause a failure to feed. Simply stated, if you wish to load solids out longer than factory spec, the Type 2 magazine is
what you need. Just keep in mind you may need to have your weapon modified to avoid feed issues.
 
I used a Type 1 Alpha with an XLR Chassis, I had to open the feed lips a tad to allow the round to sit higher andfeed into a stock Remington SA action. Once I got the lips set, it fed fine. Accurate Mags fed right out of the package.