What advantages is there to have a 220 swift over a 22-250 if any? I have a Tikka T3 lite in 22-250 and I shoot Superformance ammo at about 4000fps. I have a chance to trade another firearm for a NIB M77 220 swift but considering the availibity of 22-250 ammo vs 220 swift ammo and the fact that there is little if any difference in these two calibers I am not sure I see any advantage of the 220 over the 22-250. But I have no experence at all with the 220 swift. Any thing I am missing? Thanks