Elander 17rd mag problem

[LRRPF52]

I have two 17rd Elander mags. Today I had both of them malfunction the same way. Loaded full (with two diff. types of ammo SST and American Gunner, one type in each mag) they ran perfectly fine until the 2nd from the last round.

It ejected the spent fine, but the 2nd from the last round would get hung up on the way into the chamber and be smashed by the bolt against the barrel extension.

I know the mags are finicky but they are both doing the same thing at the same point in the mag. What's the most likely fix? Bending feed lips?

This is normally called a Bolt Over Base Failure To Feed Malf.

It is often a gas system problem, and since it happened with 2 mags in the same manner, it could be both gas system and mags.

Usually, it's a matter of the BCG not retracting enough due to insufficient gas, or excessive gas and too fast of a cyclic rate for the magazine spring to catch up with.

If you clean out the inside of the magazines, it could help with this issue.

Look for any burrs on the inside of the magazine and on the follower.