I bought the flintlock adapter from Cabelas. It has a small tit on the tube that fits in the touch hole. The needle looks to be big enough that it shouldn't fit inside the hole. They do work nice, I'll say that. No burnt residue in your gun at the end of the day. I just swabbed with alcohol and then a patch with Sheath and put the gun away. No load in the barrel to have nightmares over.