I've been using Bore Butter for over 30 years with few complaints. I learned I have to leave a finger full at the muzzle without plugging it and to re-apply every 6 months. A couple of months ago from advice from a friend, I tried WD-40 as a preservative and it works very good. Ned Roberts use to talk about whale or fish oil and if you don't know WD-40 is some kind of refined fish oil.
A better question might be: Has anyone tried CLIP to preserve their barrels from rusting?
A better question might be: Has anyone tried CLIP to preserve their barrels from rusting?