only the PMC mentioned above.Have a TRP in 10mm 5 inch model. Total of 1200 rounds through it. Have used sig, freedom munitions, and underwood bonded jhp 160 gr. I used tripp research mags, wilsons, and factory ones. Has ran flawlessly for me.
On multiple boards across the net have heard the S&B stuff has reliablilty issues in 10mm 1911s
Have you tried any other brand of ammo?
Why would they send back (repaired and tested if there was nothing wrong with the pistol in the first place?) It is probably on it's way back already.