All relatively true. But Double Tap specifically is out of line in that right on the box flap it shows that the velocity claim is based on a G20. For example, the following is what it says on an older box of DT 10mm 135gr - 10MM 135gr. Nosler JHP 1608fps / 4.6" bbl. 50 cartridges Therefore I'ld say DT doesn't have the "5 inch barrel" excuse to use. Not to mention that the DT velocity claims are a whole lot more than a "little" off regardless.