Firing a copper round through after a few (Note few) black powder rounds will help clean the bore. It may be that black powder fouling could raise pressures if you let it build up then fire a jacketted smokeless round.
I fire limited numers of Black powder rounds through my 1886 Win. No problems, I just fire a few smokeless rounds, then clean as usual. Be sure to clean the action as well.
I fire limited numers of Black powder rounds through my 1886 Win. No problems, I just fire a few smokeless rounds, then clean as usual. Be sure to clean the action as well.