I wasn't necessarily referring to Barnes. It means they've been shown to work while other 55 grain bullets, Sierra, Speer etc may not.
And a 55 grain Barnes probably won't work in a 14" twist.
It might also be noted that at one time Hornady made 2 versions of the 55 gr SP one with a cannelure and one without. The non cannelure versions were more likely to hold together better from what I have read.MB
