Hey guys. Has anyone noticed that with some cast boolit loads velocity declines as more boolits are fired? This happens to me every so often. I'll run a particular load through the chrono, starting with a clean gun. As more rounds are fired the average velocity starts to decline, sometimes the extreme spread gets bigger also. It seems most pronounced in short barrels, such as my snubnose .38 and Kel-Tec P32. Anyone ever notice this before? Could the build up of fouling be changing the pressure curve and burning characterisitics? Accuracy seems about the same when this happens.