I use them in 22lr, 223 rem, 25-06, 45 acp and 44 mag these are the handguns.
I use them in 30-06, 300 weatherby, 243, 22lr and these are the rifles.
I do not use them in any black powder weapons.
Been using them for about 12 months, and am very pleased. I still scrub with a brass brush for heavy leading (after a hundred rounds of pb 45 acp for example) but I follow up with snake. Very nice job. I highly recommend them.
I suggest getting one complete kit in a box and then ordering the individual "snakes" for other calibers. This way you have a handy case for hunting trips that you can fill with up to four snakes. This will elimanate much gear. I buy them at midsouthshooterssupply.com Hoppes makes them now or bought them I do not know which.
Cleaning guns is almost as much fun a reloading which is almost as much fun a shooting which is almost as much fun as hunting.
Fred a/k/a HappyHunter