Hoot wrote:Kelvarr wrote:FWIW, I had problems with my factory mag. It randomly ejected 3 cartridges while walking from my truck to the shooting station. Then, when fired, it combination-failed with a stovepipe, and trying to chamber 2 rounds. It did that twice. I have contacted Bushmaster about it, and they are sending me a new mag.
Luckily, I had also purchased a Bartz aftermarket mag, and that went through 30 rounds flawlessly (in both the upper and magazine).
Welcome Aboard OM!
Did you compare the amount of spring tension in the two magazines. IMHO, Bushmaster and several other companies use way too much spring tension which again IMHO, contributes to many users problems with feeding. It only needs to be strong enough to lift the last round properly into place and then catch the BHO when its empty. Hopefully the new one they send you has actually been tested in a real weapon.
Hoot
Thanks! I've been browsing for quite some time, and thought I registered before!
I did not test the amount of spring tension other than by using my fingers to push on the follower, and it feels about the same.
I my case though, the feed lips are too far apart. The cartridge casing can freely pop up right between the feed lips, without having to be forced forward by the bolt. When the Bartz and Bushmaster magazines were held so that feed lips were directly compared (one mag upside down on top of the other), the Bartz mag feed lips were a little longer, and bent in/down more, so they actually held the cartridge in place (you can't eject the cartridge straight up without damaging the magazine in the Bartz).