Sights aside, what does it take in the way of ammo to make a bull barreled Parabellum work? All else being equal, a heavier barrel implies more impulse required to cycle the action. Of course there would be the same question with a long barrel, but at least the long barrel tends to produce more velocity which produces more impulse. From what I've heard, the weight of a long barrel goes up faster than the impulse so they like spiffy loads.
|