Even more inexplicable are the shooters who choose the Thor-Hammer 147-grain over the competing loads from FreedomFist and ‘MurricaHeckYeah because, according to the data on the box flap, it’s 30 fps faster at the muzzle.
I don’t mean to be the bearer of bad tidings, but those box-flap numbers come from a test barrel at the manufacturer’s facility and may or may not have much correlation with how fast a projectile is ticking along when it exits the muzzle of your own pistol.