Bought one from Amazon . It is a 177 & 22 . Used the 177 on my choked Challenger barrel and the bronze brush was tight but I did get to pull out as well . The pointed jag worked as well .The Hoppie brush would not start in the barrel . And the hoppie jag was to large to enter the barrel with a patch nor would the Gamo . Although the Gamo nylon brush would enter the barrel . So I am happy with the kit . I had these results with Hoppie and Gamo on all my choked barrels . I scope the barrel and have a clean barrel now . It is a LW barrel . The first I have seen that has wide and narrow lands alternating . Marvin