[QUOTE]
Originally posted by 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.
Bulletpusher "BBRSSC #1" [/QUOTE
www.winchester.com You can see the differences in the muzzle velocity and the downrange velocity changes in these 2 cartridges here. You'll notice that the 22-250 has a higher muzzle velocity than the 220 swift, but the 220 swift has a higher ballistic co-efficient on its bullet, meaning it's more streamlined, so when downrange, the 220 swift will eventually have the speed advantage.