I would have to say Nobel sport AS or AO but as soon as my last 2 1lb bottles are gone its gone for good since the stuff isnt imported anymore. My next choice would be unique but it is kinda dirty so I tend not to use it much in my loads for semi auto pistols. ive found green dot to be pretty versitile and fairly clean. for my 45 acp loads I like clays, pretty clean stuff and meters well.