I just switched from Red Dot (which was dirty at 18.7 running somewhere near 1300), to Titewad. In fact after this post, I need to find which bushing will do the job as this stuff is dense, almost like ball powder compared to RD. Lots of folks like Extra-Lite and say it is clean as well.
In 20, I use Universal because I also use it for pistols, but 20/28 and Green Dot are getting good reviews for 20 gauge 3/4 oz loads
“I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.” - Robert McCloskey