Sounds like what he describes is beyond lapping...but maybe not.
I have restored a couple of rusted out bores with sandpaper (very fine) and steel wool...excellent results. One bore that was on a pistol, shoots as accurately as another, same model pistol with a new, pristine barrel. Go figure! It does indeed take the lands down some, but really it's interesting how much rifling you can lose, and the firearm will still shoot good.
:results:
Will it reduce the life of the bore? Possibly, depending on how much, or how many times it will be fired per year. A hunting rifle will probably never see the bore "shot out" in the owner's lifetime. Combination target rifle, plinker, and hunting
[url] rifle...again[/url], possibly.
Steel wool is quite gentle, and really will polish more than remove much metal...try removing metal from something, sometime, using steel wool...!! Not really the hot-ticket.
:no:
Anyhow, sure you don't want Bozo-Joe poking sandpaper down a good rifle barrel, but really, done intelligently, carefully, with a little bit of sanding and lot of wooling, that bore could turn out really nice. All depends on how bad it really is.
Rat