Just FYI. I ran my JM (had only about 50 shells through it prior) for the first time Wednesday and Thursday at the Midnight 3-Gun in Oregon and might have learned something (maybe not, though). The first night, with the gun squeaky clean, I had a failure to feed on every stage and had to rack it at least once per stage to keep shooting. After all the dust and sand blowing around that night, I knew I should clean it before the next night, but was just too danged tired from being up 28 straight hours. Ironically, it ran perfectly on Thursday night -- never even a hiccup. Perhaps it was because it was broken in a little better, or maybe it likes to be a little grimy. Who knows, but I found it interesting and somewhat perplexing. Now I don't know whether to clean it or not.