Yup, got them for every caliber and both the 12 and 20 gauge and do wash them once in a while. You can put any solvent on them you like and a drop of oil on the tail puts a light coat in the bore after the initial cleaning.
I really like them when I'm out in the field on a weeks hunting trip. They fit in a small space and do an adequate job of cleaning. I don't beleive they replace a rod or better yet an Outers Foul Out II which cleans down to the bare steel on a bore by plating the lead or copper onto a stainless steel rod suspended in solution in the bore.
Bob from Idaho