[bulletpusher]

model 70

The 220 Swift and the 22-250 can shoot the exact same bullit, same diameter, same length, same weight, same aerodynamic properties. The Swift holds more powder in the case than the 22-250. Thats how it gets more speed. They are like two peas in a pod as far as performance. The differences in performance are so small that once the trigger is pulled you and your target can't tell the difference. If you look at modern loading manuals, and use modern powders you will get almost the same result. Its just that because the Swift case (taken from the 6mm Navy cartrige) and the 22-250 (taken from the 250-3000 Savage cartrige) do not hold the same amount of powder. Nuff said.

The 308 and the 30-06 fall under the same rules. The 06 case is longer than the 308 case and can hold more powder. Because of the case efficentcy of the 308 cartridge it will do almost vertually the same as the 06 cartridge.

The 308 and other small/short cases are the in thing for long range target shooting and because the 308 was the most recent 30 cal. military cartridge it is more sexy.

The 30-06 was winning compititions and 1000 yard matches before the 308 was even a dream in its designers head.

The 30-06 works better than the 308 with the same bullet weights but the differences are minimumal, that is untill you get into the heaver bullets. That is where the 30-06 pushes further ahead of the 308.

Just as with the Swith and 22-250 the more powder you put behind a bullet the faster it will go and the flatter it will fly. Just remember that all things have a limit. You can't make the 30-06 into a 300 H&H, 300 Winchester or 300 Weatherby, just by putting more powder in the case.

Hope this helps.
Bulletpusher "BBRSSC #1"