Glock barrels shouldnt have large amounts of lead shot through them. Can cause an issue. They also leave a large part of the case unsupported and can cause a pretty extreme failure when shooting hot 10mm loads. I have pics of the famous glock smile on heavy 10mm loads I've ran through a couple different 10s I've owned I can send when I get a chance if interested. Wolf barrels are ok, not the best. I've owned 3 and they all shot well enough. One would cause some jams at times though. Only time I've ever had a glock fail on me