This is the e-mail I sent to S&W. Hope it doesn't sound too snarky as that was not my intent. Any response from S&W will shared in this thread. Disclosure: I have 2+ cases of wolf gold .223 and so far have about 500 rounds through my Sport II with no problems (its accurate in my rifle too).


"Good Morning,
I have a question about the M&P 15 rifle and its reported incompatibility with Wolf Gold (brass cased .223) Ammunition. As I'm sure you know there is a advisory from the Wolf Ammo Mfg. specifically mentioning the use of their ammo with the M&P 15 platform. No other rifle manufacturer is specified. As the owner of an M&P 15 rifle I believe there is a legitimate concern with any out of battery conditions that may be present with this rifle, Bolt Carrier Group and or barrel extension? Curious that only the M&P 15 rifle is specified by this ammo manufacturer.
Thanks in advance for your response,
Sincerely,
**** ****** "

(I tried to include the advisory that WVSig shared in his OP but it wouldn't go thru in the e-mail I sent to S&W)