I just removed a half dozen posts as a gentle slap in the face for people who like to answer questions which are asked to others. It isn't allowed on this forum till I have had my go first. Sorry. There was nothing wrong with any of the posts except the posters were breaking the rules of my forum. I get quite offended at having the last go at a question asked specifically to me, and having to explain away someone elses answer.
When I wrote in the catalog that blue soft tends to leak through any cracks between sizer and bullet on the Star sizer, it was because I hadn't used it much myself in one yet. Blue soft will work beautifully in the Star, if one doesn't turn the lube screw down too hard. My problem had always been cranking it down till it quit so I could run more bullets before turning the screw again. As a reference point, Blue soft will stand more pressure without leaking than alox or RCBS lube, and people use both in stars without problems.
I developed my lubes in Arizona heat. Blue soft will not wet powder in loaded ammo when you leave it in the pickup window on the dash, with temps hitting well over 200 in summer. The exceptions are. If your bullets bottom drive band has a seam from poor casting, which runs across the drive band face, it may allow leakage, or if bullets are seated in bottle neck cases with lube exposed to powder, you can get powder wetting if ammo is exposed to extreme heat. Neither practice is allowed by most casters as both hurt performance.
I'm finding that rarely does anyone ever go back to blue or Commercial after trying blue soft. It stays on just as well, handles extreme heat better, and rarely needs heat. Nothing will beat it for rifle or handgun, high or low velocity.