Sounds like a weak mag spring.
FWIW, you can do a 'mag dump' or wait three or four days between shots, the physics are exactly same.
What value does a 'mag dump' have?
"If you're not shootin', you should be loadin'. If you're not loadin', you should be movin', if you're not movin', someone's gonna cut your head off and put it on a stick." -Clint Smith