I did a conversion on a Hatfield .50 perc. to flintlock using L&R lock and 5/16x24 liner. I noticed when I removed the drum that it extended about an 1/8" into the barrel and the liner does the same so you could not clean the breach face without removing the liner. The question I have is, should I file the liner till it 's flush (on the inside) or leave it? I could unscrew it a bit or remove to clean.