Ive got no personal experence... but I met one guy who does... the scuba instructor I met on vacation (in branson) shoots highpower, and lives a few doors down from swampy. He says the new bullets are still just as good as ever.
I know its kinda... I know a guy who knows a guy... but in talking to him for the better part of an hour, I figured out he knew his stuff... and good from bad.