Dingel, I shoot many thousands of paper patched rounds per year. They are the only kind of bullet I use in centerfire rifles and they are the predominant bullet I use in muzzleloaders. I find no evidence of wear after years and years of shooting. It is a nonissue so far as I'm concerned, and I am pretty particular as most of those rounds are for competitions at ranges from 200-1000 yds depending on the game.
Some folks have tried to measure bore wear, but everyone to date has gotten old and died or bored and given up before wear could be detected. I can still see the reamer scratches in the throat of my most often used rifle. That barrel is right around 15 yrs old and I cannot even guess at how many round have gone down range from her.
Brent