Funny you should ask that, you know the bolt is kinda silver, well the face was BLACK, powder caked on the face, side. But she keep working. I also ran my bolt a little wet (oil'ed up more than medium like I do normal). I was doing a test this time to see if the M&P liked being oiled up verus dry lubed. Now granted I shot 1300, my friend who wanted to just try my M&P wouldn't stop after the first mag, he ended up shooting the first 200 rounds. I wish I took a picture of his face, he had a smile from ear to ear. He is going to get an M&P first quarter of 2012 now. Clean up was pretty easy, just soaked the bolt in Gun Scrub for a few, scrubed her down with the nylon brush, wiped her down, oiled her up and put her back. This rifle rocks.
PS, my fingers are a little sore, I think I will stick to 1000 per range day. Also got to buy more ammo now.. I'd order the CCI tactical on line but the cost of shippment is about the cost of the ammo. Can't find it local most carry only the CCI Bulk. Keepem in the 10 ring.