After coming home from firing 159 rounds through my glock 27 today, I noticed that it wasn't all that dirty when I cleaned it. Now my glock 30 is a mess when I bring it home. I usually shoot about 100 rounds when I go to the range with it and I have so much carbon I'm pulling out. I'm guessing its because I use Winchester white box and Remington fmj. The 40 cal selection at Wally World was low and they only had federal flat nosed fmj. I'm guessing Winchester and Remington are dirty?