That said in the case of Crosman pellets you can simply wash them with soap and water and then just let them dry. This not only improves accuracy but it will actually increase the BC value of the pellet. Airgun pellets are very sensitive to dirty barrels.
I truth you can simply use a doubled over piece of fishing line 50 LB test, but I have been known to use nylon brushes and bore paste, actually I prefer Rem-clean. Some of you may think that this is over kill, but think about this you pay 150 bucks for and air rifle and in comes with a stock and a complete power plant, while a 22 rimfire barrel can run over 300 dollars!
How polished do you think your 150 to 250 dollar airgun barrel is?

?? Then consider how easy it is to squash and airgun pellet in your fingers, try that with a 22 LR bullet!
What I am saying is the more polished AKA smooth your barrel the less leading you are going to get. I know guys who use a quick cleaning pellet coated in jewelers rouge fired in front of a led pellet! That is a quick and dirty way of doing it, but in the case of spring guns don’t use heavy pellets. You should not use heavy pellets in them anyway, unless you are talking about a real magnum piston gun, like a RWS 45/52/54 and up power.
White Foxx