THE SMART TRICK OF RUGER .22 THAT NO ONE IS DISCUSSING

I started out with Mini-Mags and right away had problems. I could not shoot even four in the row without having failure to extract. Soon after battling about 20 rounds, I switched to Velocitors and almost everything was good.Explain to me, why must I maintain this GP100, return it to Ruger for support, and/or hold it or any of another Ruger firearm