I have used JB Bore Paste but not the other one you mention. Where did you get that? The bore paste is only meant to remove material, and polish the bore. It is not meant to remove metal from the bore. I have had very good luck with JB Bore Paste. But to be honest, before JB Bore Paste we used to use Comet Cleanser. Make it into a paste and apply that to a patch. But it is a mess. Still it washed out easy. But Comet did not do anywhere near as good a job as JB Bore Paste.

I have a friend that passed away. And to be honest, he used to do a mild lapp on any new rifle he purchased. Not a lot mind you. And never a fire lapp. Just a hand lapp. He claimed it too out the barrel imperfections and made the rifle start shooting better, sooner. He was a heck of a shot, and his rifles were accurate. Whether he was right or wrong.. you be the judge.