Hi Nick,
I've been shooting a Huntsman a long time and this is what I've learned. (I figure these apply to any break open or in-line muzzleloader). I use the permatex anti seize compound on the threads. Coat threads all around, top to bottom. Tighten hand tight, using tool, then barely snug with a screwdriver through the holes. At the range, after each second shot, I crack the threads and re-sung. I never have a problem removing the plug anymore. I don't quite understand what you mean when you say the breech will be difficult to keep closed. The only time I had a problem the gun breaking open was when I wasn't changing the orange primer carrier enough. They looked o.k. but must have been out of tolerance or something. Now I change the carrier after every 10 shots or so. I wipe it off after every shot before inserting a new primer and wipe out the breech before putting the carrier in. This has solved the break open problem. You can also do a search on breech plug tools on this forum and find numerous ways to make a stouter, easier to use breech plug tool. Good luck, Ambush
