by commander faschisto » Sun May 08, 2016 12:57 pm
If that's still happening with minimal spring pressure, need to look at tweaking the feed lips closer together...lots of us have done that to other metal mags especially early on in the production runs for the 450b, and the discussions should still be in the files here somewhere. If you can search them, you'll see pics of the proper orientation. Basically, you want to achieve a slightly nose-up orientation for the top round. We've also found that holding the rounds perfectly level is not a good thing for this caliber, as is also the case as with your example, when the cartridge is held too much nose-up. Your examples in the pics are wildly off, and I can see why there's a feed problem, to say the least.
Closing the gap between the feed lips can be done by placing the mag feed lips top-down on a hard surface, like a bench top, and then gradually pressing the mag firmly but carefully downward to bend the feed lips closer toward each other. Do it a step at at time until you get the top cartridge being held slightly, but clearly, nose-up. Check the position of the feed lips left-to-right to make sure they are bent equally on each side, so that they look "level" across the mag. Load up a few rounds and test each tweak amount for feed reliability. Repeat as needed...
This has been done by lots of us before, and should work for your set of mags, theoretically. See how it goes and let us know.
Isa Akhbar!
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