Back in 1979 I bought a new Ruger M77 in 220 Swift which still sits in my safe alongside three 22-250s. As far as velocity goes it is a lot easier to propel a 55 grain projectile at well over 3700 fps with the Swift than it is with the 22-250. In fact my fastest load with the 22-250 tops out at 3665 fps.
Accuracy between the two cartridges is pretty much like splitting hairs and my Ruger will put five factory Norma 50 grain rounds in a tidy .6" group at 100 yards and my reloads will do better still.
Over the years I have noticed that the main stream reloading manuals have drastically reduced the max loads for the Swift. My advice to you is buy a copy of the latest Lyman 50th edition reloading manual if you don't already have it. As an example of the difference the Lyman lists 39 grains of IMR 4064 as the max load with a 55 grain Sierra projectile for a velocity of 3900 fps. Sierra lists 35 grains as the max load with the same powder and projectile for 3550 fps. IMR 4064 is the powder that I have found to be the most accurate in my Swift.
Although I have a lovely Ruger No1 in 257 Roberts I have always thought the 220 Swift with its semi-rim would be a fantastic cartridge for a falling block action. A good friend of mine has recently purchased a Winchester 1885 with a 28" barrel chambered in the Swift, it will be interesting to see how that rifle shoots!
Happy shooting with your new toy!
Bookmarks