Canik TP9SFx Problems!!!

Great pistol for the price, but if it won't run 147 grain ammo... We tried 147 grain Freedom Reman and Factor New and got failure to extract issues repeatedly. After leaving the pistol locked back for two weeks, Dan brought it to the range and we tried it again. Jam-o-matic on 147 grain Freedom, better performance with 124 grain (far fewer issues), but still... Apparently, runs find on 115 grain and 124 NATO from what we've read and have been told... Be warned, if you shoot lower power reloads for competition and/or 147 grain, your mileage may vary considerably!