I just installed my new GRT III trigger and moving forward with the home tune on my Gamo 440 Hunter (a refurb bought from Cabelas). However, the barrel screw seems to have been put on with red loctite. I have tried everything to get it out (heat, force, etc.) without luck. The screw head is pretty mangled but not stripped out. Any ideas as to how I can get it out and when I do, where I can get a replacement barrel screw? Thanks in advance for any assistance/guidance.