Forest bore cleaner foam is a fast acting copper fouling remover suitable for use in all rifle barrels.
Simply spray the foam down the bore of your rifle & leave to work for 15 minutes. Once the foam has worked you will notice that it changes to a light blue colour signaling that the copper has been removed. The foam can then simply be brushed out of the bore using a cloth patch or phosphor bronze brush.
If the build up of copper is heavy in the bore then the above steps can be repeated until the foam appears as the normal white colour.