To correctly answer this question your definition of best needs to be clearly stated. Are you asking what is the fastest? If so, the answer is the swift. Accuracy is a tough question. It depends on a lot more than just the cartridge itself. However many people I know would argue that the 22-250 is more accurate.
One question that I have for you is, is this going to be a custom gun or factory? One note I would like to make is that if this is a factory gun then either cartridge really looses its effectivness out past 600 yards. Most factory barrels for either come with slow twists and are not capable of shooting the heavier more efficient bullets. If you are going to get a factory gun than in my opinion you would be best suited with a 22-250.
I am not well-versed in long range shooting and neither is my younger brother, but last week in his first attempt to shoot my Rem 22-250 Varminter, he shot a 4 inch group at 535 yds. I thought that spoke for itself. jm2c
The Swift beats the 22-250 by a significant amount, performance wise. A 22-250 Ackley will usually beat a 220 Swift by as much, but speaking strictly of the factory chamberings, the increased muzzle velocity of the Swift has a price.
In a magazine rifle, the cartridges won't feed as well because of the semi rim. Also, Swift cases need to be watched constantly and trimmed to length. A 22-250, less so.
Can't help it....back to the 22-250 Ackley. Never needs neck trimming, faster than a Swift in a more efficient case, and the brass seems to last forever. What's not to like?
Condor, The 22-250 is a great round. However, the Swift is a much better longrange varmint cartridge. If you want longrange, go with the Swift. I shoot the Swift, and I always out shoot the guys with 22-250's at longer ranges. Goodluck!!
my plan is to build a longrange rifle i want to start with a rem 700adl and so bye a lilja or a shilen barrel, timney trigger, hs stock an 6,5x20 scope.
i is the 220swift better for fox and beawer and goose and other animals or should i consider a 22-250 or a 22-250ai?? [img]/ubbthreads/images/graemlins/cool.gif[/img]
I shoot a custom 220 Swift with a 1/12 twist w/27 barrel length. I'm able to shoot the 55 ballistic tips at 3900. I'm also able to the Sierra 69's very well out past 700 yards.
I also have a factory 22-250 Ruger #1 varmiter. It shoots well also but not at the distances that the custom Swift is able to. I enjoy that Swift very well on PD town shoots in Wy. and those 69's come into play with that wind.
My powder of choice is VVN160 w/55's and RL-22 w/69's.
The piece about having to trim the cases regularly is very much a fact. I don't mind it. There is also an improved version of the Swift out there that greatly reduces case trimming.
I have a shooting friend who shoots the 22-250 improved and he does very well with that cartridge.
IF you are going to with a standard chamber in a custom barrel, I think the Swift gets the nod for better performance all around. It is an awesome older cartridge that just keeps coming back into play in the shooting field. I think you would be happy if you had one.