In auto loading fireams, the magazine is the weak link. It is relatively flimsy and gets a lot of abuse.
CLEAN YOUR MAGAZINES WHENEVER YOU CLEAN YOUR GUN. Disassemble the mags and clean inside and out. As a general rule of thumb, the spring should have 3 coils of free length with the floorplate removed.
If you have a fixed floor plate magazine (1911) learn how to disassemble it.