I used the Final Finish system on my A&B 220 Swift barrel, but only numbers 3-5 of the kit. They were the first 30 rounds down the barrel and it shoots MOA or better and is a breeze to clean. I accidently bought the TMS for a .243 and reordered the bore polishing for it. I have about a hundred rounds through this barrel and will probably shoot another 50 and then use the polishing loads to see if there is any improvement.