I finally got my 9mm/38/357 gas check maker from 22lrreloader.
The only aluminum sheeting I could find on hand was a piece that is white on one side and brown on the other. The gas checks punch out ok but the paint is scraping off on the edges.
My question is will the flaking paint damage the bore of the gun?
Should I just toss this sheeting and go to Lowe’s?