Buy and new recoil spring and magazine from reputable manufacturers. Wolff or factory for the first, factory (or Metalform for 1911s) for the magazine. Good (the generic stuff they all make may not be the best first choice ) ammunition from reputable manufacturers for the ammo: CCI, Cor-Bon, Hornaday, Remington, Speer, Wincester.

If you're still having problems, have a good instuctor observe you shooting. Not all shooters can self diagnose/correct issues with their fundamentals. I can recall a married couple who both failed to have a firm enough grip on their shared weapon. Once that was corrected, all their "weapons issues" disappeared.

Issues with particular ammo types may require consultation with a skilled gunsmith for your particular firearm.