Originally Posted by Kanewpadle

To be more specific, I shoot the least expensive range ammo I can find that I KNOW is good quality. Which most of it is.

Tulammo at Walmart, I know nothing about except that it's very dirty. Winchester white box is good. I've also shot Magtech, Fiocchi, Sellior & Bellot, CCI Brass, American Eagle and others with no problems.

Wish I could be more help but I've never had any jamming or feeding issues with any of my M&P guns. None.