Quote:
polygonal rifling and lead boolits do not mix
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Depends on the type of rifling.
My G21SF never leaded with my LRN loads. One pass with a barrel mop and it was mirror again.
Now my Kahr K9 has a different type of poly rifling, looks more like a stopsign. It leads just looking at it. Glock has what amounts to be a smoothbore with some speedbumps thrown in.