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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
220 Swift Improved?????
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<blockquote data-quote="brianwinzor" data-source="post: 68519" data-attributes="member: 1067"><p>srhaggerty, </p><p>There are a variety of improved swifts, and the 220 Weatherby Rocket that GoodGrouper mentions is one that has enjoyed some popularity. </p><p></p><p>I owned a 220 Swift Ackley improved with 40 degree shoulder in the mid 1980's, and the Winchester .220 Swift cases which I used had a capacity of 50.4 grains, and a capacity of 55.5 grains after fireforming. </p><p></p><p>Although I have only tried one "improved swift" , I believe that ballistically there is probably not a lot of difference between the various versions. Consequently, I would not enter a debate into which one is the best.</p><p></p><p>I agree with GoodGrouper suggestion, and also recommend you use it for bullets of 80 grains (or more). </p><p></p><p>Now that Sierra have introduced a 90 grain MatchKing, and with Richard Graves introducing an excellent variety of Wildcat bullets bullets in 80 - 100 grain weight, I believe that an "improved Swift" with a 1 in 7 twist barrel, would be a good platform for those bullets. </p><p></p><p>However with cases of this capacity (or larger), if you fire 3 shots in about 3 minutes the barrel is hot, and you should then wait for it to cool before firing again. So if the rate of fire is likely to exceed that, then I would choose a smaller case. Regards, Brian.</p></blockquote><p></p>
[QUOTE="brianwinzor, post: 68519, member: 1067"] srhaggerty, There are a variety of improved swifts, and the 220 Weatherby Rocket that GoodGrouper mentions is one that has enjoyed some popularity. I owned a 220 Swift Ackley improved with 40 degree shoulder in the mid 1980's, and the Winchester .220 Swift cases which I used had a capacity of 50.4 grains, and a capacity of 55.5 grains after fireforming. Although I have only tried one "improved swift" , I believe that ballistically there is probably not a lot of difference between the various versions. Consequently, I would not enter a debate into which one is the best. I agree with GoodGrouper suggestion, and also recommend you use it for bullets of 80 grains (or more). Now that Sierra have introduced a 90 grain MatchKing, and with Richard Graves introducing an excellent variety of Wildcat bullets bullets in 80 - 100 grain weight, I believe that an "improved Swift" with a 1 in 7 twist barrel, would be a good platform for those bullets. However with cases of this capacity (or larger), if you fire 3 shots in about 3 minutes the barrel is hot, and you should then wait for it to cool before firing again. So if the rate of fire is likely to exceed that, then I would choose a smaller case. Regards, Brian. [/QUOTE]
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220 Swift Improved?????
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