A Closer Look at The 220 Swift

Written by Sierra Bullets Ballistic Technician Paul Box

220 Swift Sierra BulletsThis cartridge was introduced by Winchester in 1935 in their model 54 rifle. A year later, it was added as a standard cartridge in the model 70. What might not be common knowledge to some reloaders is that the prototype for the Swift was developed in 1934-35 by Grosvenor Wotkyns by necking down the 250 Savage case, but in the end, Winchester chose the 6mm Lee Navy case for the foundation for this cartridge.

This cartridge was far ahead of its time and for that reason it received a lot of bad press. We’ve all read the horror stories thru the years. Many of those stories were just simply repeated from previous articles even the wording was just slightly different. So how bad was the Swift? Let’s take a deeper look.

Some of the early Swifts had soft barrel steel and some of the rare ones even had barrels that were .223 in bore size. This stemmed from the fact that the .22 Hornets prior to the end of World War II were .223 in bore size and some of these barrels were chambered in the Swift. It was rumored that the Swift peaked in pressure far too quick. I’ll bet they did with a turkey extra full choke barrel.

Burn rates of powders were limited at that time as well, so the Swift was limited in its true ability due to that. It was almost like building a funny car for drag racing when only kerosene was available.

One of the longest lasting black eyes was that it shot barrels out so fast. If you get the barrel branding iron hot and fail to clean it often this can happen. Common sense will go a long ways here. Keep the barrel as cool as you can and properly clean it every fifteen rounds or less will go a long way to improving accuracy life of a Swift.

So what is the real truth about this cartridge? I’m glad you ask. I’ve been shooting the .220 Swift for over 43 years now. It is one of the best varmint cartridges I’ve ever owned. It is not hard to load for, it doesn’t suddenly peak in pressure and it isn’t the barrel burner that you’ve heard. Hodgdon powders once reported a Remington 40-X with over 3,000 rounds of full power loads averaged .344” for five, 5-shot groups. My findings have been the same. It isn’t as hard on barrels as it has been made out to be.

I’ve also read that down loading it slightly will help in barrel life. This is true, but if you buy a thoroughbred you want him to run. Barrels are threaded on the end for a reason. If you have enough fun to shoot out a Swift barrel, just rebarrel it.

The bottom line is enjoy the .220 Swift for what it was meant to be. The popularity of the Swift has slipped in the last twenty years and few factory rifles are now available in this caliber. There is no reason for this and I know the Swift will always have a strong and loyal following.

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6 Responses to A Closer Look at The 220 Swift

  1. firstriverbend says:

    Had one decades ago, extremely fun to shoot! Pushed the pill out so fast, it was almost like it got there before you pulled the trigger! 🙂


    • Bob Wolfe says:

      “like it got there before you pulled the trigger” Ain’t that the truth ! I thought I’ve seen them drop before I heard the BANG !

      Liked by 1 person

      • firstriverbend says:

        I never understood all the fuss about this cartridge, although I had a kind of special example. It was a custom built rifle I picked up very cheaply as it was in a friend of mine’s gun shop that he had taken in on trade. Had a 30″ inch barrel that was either 1 1/8″ or 1 1/4″ diameter, too long ago to remember for certain, along with a stock best suited for shooting prone. However, that made sense, as it weighed about 15 pounds bare and even more with a scope on it. Certainly was no offhand rifle that is for sure!
        But it drove those bullets out really fast and hit whatever you had in the crosshairs! While not a big shooter and it did make enough noise to wake the dead, it was a total hoot to shoot!!! 🙂


  2. Scott Godwin says:

    I”m new to this newsletter and want y’all to know that I thoroughly enjoy receiving and reading the information provided. I hope that you will continue to send out these notes and I’ll look forward to receiving them for many years.

    Scott Godwin Dripping Springs, Texas

    Liked by 1 person

  3. bill scott BA Okla. says:

    I have shot the swift for over twenty years. Changed a few barrels, but have thought that it was one of the best all around guns for fun. If you put the pill in the right place it will do the job.

    Liked by 1 person

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