2% in capacity in an empty case, yes, with no seated bullets.. Is the 6.5X55 a stronger case? I have no idea. A 260 in a long action? Kind of defeats it's purpose. Now for a real rifle loony question, is the 6.5X57 cartridge better than both the 260 Remington and the 6.5X55 Swede? Now we are talking a 4% increase in water capacity. However I have yet to shoot a round with water as the propellent.
