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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
220 Swift, twist rate, barrel length
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<blockquote data-quote="TOM H" data-source="post: 1152455" data-attributes="member: 306"><p>You are right and Sierra did use 1/14 twist Savage for the 220 Swift. Sierra manual for the 69gr HPBT MatchKing is little different and Sierra words "Requires a 1x10 twist barrel or faster".</p><p></p><p>Sierra manual for the 80gr HPBT MatchKing "Requires 1x8 twist barrel or faster" </p><p></p><p></p><p>There was 23 max loads for those bullets and only 7 of them reach 3200fps.</p><p></p><p>Sierra manual for the 22-250 they did same thing for the 69/80gr bullet and they use 1/14 but for the 22-250AI/22BR they use 1/8 for all test load but they did put warning about what twist for the 69/80 bullets.</p><p></p><p>Nosler manual has loading data for fast twist barrel 1/8 for the 22-250 and for the 220 Swift they use 1/14 but only show data for the 63gr. Speer manual for the 220 swift they do have loading data for 70gr bullet but they have a warning on front if using 1/14 twit barrel. Hornady manual also has warning for the 220 swift that their 60gr V-Max will not stablize in 1/14 twist barrel.</p><p></p><p>If you ever owned a 220 Swift with 1/14 twist barrel you would of read a manual.</p></blockquote><p></p>
[QUOTE="TOM H, post: 1152455, member: 306"] You are right and Sierra did use 1/14 twist Savage for the 220 Swift. Sierra manual for the 69gr HPBT MatchKing is little different and Sierra words "Requires a 1x10 twist barrel or faster". Sierra manual for the 80gr HPBT MatchKing "Requires 1x8 twist barrel or faster" There was 23 max loads for those bullets and only 7 of them reach 3200fps. Sierra manual for the 22-250 they did same thing for the 69/80gr bullet and they use 1/14 but for the 22-250AI/22BR they use 1/8 for all test load but they did put warning about what twist for the 69/80 bullets. Nosler manual has loading data for fast twist barrel 1/8 for the 22-250 and for the 220 Swift they use 1/14 but only show data for the 63gr. Speer manual for the 220 swift they do have loading data for 70gr bullet but they have a warning on front if using 1/14 twit barrel. Hornady manual also has warning for the 220 swift that their 60gr V-Max will not stablize in 1/14 twist barrel. If you ever owned a 220 Swift with 1/14 twist barrel you would of read a manual. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
220 Swift, twist rate, barrel length
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