Haven't tried any others--partly because I use a lot of powders that include decoppering agents these days, and all the rifles I have that benefitted from DBC have already been treated.
My guess is neither Brownells or MidwayUSA sold enough DBC to make it worthwhile for them--or Dyna-Tek. This is probably also due to another factor: DBC works really well and lasts a long time after being installed.
