This spring completely salvages mag springs that have lost their “push” to get that last round into the chamber. Failure to go into battery is what it’s calledI think. Don’t replace your magazine just buy this spring! Stretching your old spring also works for a while. Wilson is the better way to go.
Best way to improve feeding issues
I had feeding issues with my 1911 compact,these spring and follower kits cured all feeding issues