A simple test would be:
Take a small smooth steel bar, such as a shaft and put it in a drill.
While the drill is running at say, 1425rpm, push a piece a brass against the rotating bar. (Bar and brass must be clean) If the jag is the cause of the wear, then within a couple of minutes the brass should create a groove in the bar.
I think 1425rpm for a few minutes would represent many years of cleaning.
Don't lose you fingers doing the test.