I had never used HbN before but have used WS2 for years with excellent results. I decided to try the Boron compound just to keep things cleaner and avoid any potential Rxn of the sulfur component. I also noticed some WS2 loads sticking after long storage. I came into a Howa 300 WM by some stupidity on my own and found it to be prone to putting all shots into one slightly ragged hole. I figured this would be a good candidate for boron so I treated some bullets and cleaned the bore and swabbed it with alcohol boron. It turned it into a 2-3" rifle. Tried several of the earlier successful loads with the same disappointment. Finally cleaned the bore and loaded some clean/untreated bullets and shot a bit after 3 foulers the grouping seems to have returned to the formed level of precision. Anyone else seen this kind of results?