I've used it in 28ga target loads with good results. In that application it burns fairly clean. I have the original insert that Dupont published for 800X when it was introduced. There are some loads in there making between 4-5000 LUP's. Now that is some low pressure. I always thought I might try some sometime in the right gun but haven't yet done so. As for dirty,what is dirtier, 800X or black powder. 2 swipes with a bore brush would clean out 800X residue.