A test barrel keeps a level playing field for a even comparison. All I can tell you that independent tests on YouTube confirms their speed. I can see a difference between normal SST and Superrgormance SST out at 300 yards. Not much, but it would make a bigger difference at 400-500 yards. In my gun 130 SST Superormance are tack drivers. I sight my gun in to be good for 0-300 yards without hold over.
..I would be lucky to reload this accurate for my JOC rifle.
3 shot 100 yard group.
I am going to chronograph them this week for a free custom turret for my Leupold VX6.