Well the weather was nice this evening after work so I took my M&P10 out and fired some rounds through it. I fired several rounds of American Eagle, PMC, and Aguila branded ammo in both .308 and 7.62, and the gun fired and functioned fine. No failures to feed or short stroking. It does seem to eject the empty brass out with a bit more force than it did prior to S&W drilling out the gas port. So at this point I am very pleased with outcome and service that was provided by S&W.

I also fired each type and brand of ammo with the factory charging handle as well as the Radian Raptor charging handle that I was originally trying out when my issues all started. Though I did modify the Raptor charging handle a bit by removing some of the hump on top and the channel as others on here had mentioned sometimes needs to be done to use it in the M&P10.