My range doesn't allow the use of magnums due to the backstop and shooting the shorter shell specials from the magnum leaves a serious crud ring in the cylinders that's near impossible to clean. (And yeah, I've tried the oversized brush on a drill, and flared .357 case as a scraper.... still way too hard to remove.)

Is there a .38 special cylinder that S&W makes that I can swap in and out on my 686?