In cases like these, there are two sources for the problem: the magazine's feed lips, and the pistol's feed ramp.
The first thing to try is a properly-fitting, high-quality replacement magazine. That's the least expensive solution. If that works, you're home free.
In many cases, the pistol's feed ramp needs to be polished so that bullets with edges (HPs) have nothing to "catch" on. This is a job for a gunsmith, and can get expensive, which is why you should try another magazine first.
Sometimes, shooting 200 to 300 practice rounds (of RN) through the gun will polish its feed ramp sufficiently to permit feeding HP ammunition.
Trying that tactic can't be bad: everybody needs as much practice as he can get.