as above. they are good for getting the majority of powder out when you are feeling lazy.
they are not a total solution, still need to have a powder solvent and occasionally a copper solvent thru on a patch/brush ect and a bore preserver once its clean
they are great for getting the oil out of the barrel before shooting too,
side note if they have a brush inside them donot under any circumstances try to pull it back once its half way thru
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