I was at the gun store yesterday, and snagged a golden oldie before it could go to ebay. I haven't seen the stuff in ages. CF Ventures Soft gas checks. If you're not familiar with it, its basically dental wax in sheets, and the idea was to press the sheet over your case mouth after priming and charging the case. It was really only a thin, hard wax cookie between the powder charge and the bullet base. Some likes them, some didn't. I tried a sample and didn't see much, if any improvement. Has anybody else tried them? I bought it because I wanted to play with the wax, and they were cheap.