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220swift in a long action

dljacko
I am wondering if I can convert a ruger 300win mag to 220swift. I have a ruger 300win mag and would like to have another rifle which is the same weight and handling characteristics as this but in 220swift. Is it possible to have such a long action converted to 220swift and still have it feed the bullets ok?
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6 comments

Date Votes
  • dljacko
    I am left handed. I have a Ruger 77mk11 in 300 winmag. I have come to the realization that Ruger never made a short action left hand, so I am wondering how it would be,if it were possible to re-barrel a Ruger long action, to 220swift. Would the bullets feed from the magazine? This way I could have two identical handling rifles in the calibres I love to shoot. any advice?
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  • surbat6
    The only problem I see with this conversion is the difference between the case head diameters of the two cartridges. The length of the action would be less of an issue.
    The .220 Swift has a base measuring .443 inch and a rim of .472, the .300 Win. Mag.'s base is .511 with a rim of .530. This means that not only the barrel, but also the bolt would need to be replaced.
    Ruger made the M77 in .220 Swift, so it may be possible to find one in that caliber and, if necessary, re-barrel so its weight and balance approximate that of your .300.

    "I think of my gun as a tool for converting worthless human garbage into valuable fertilizer." John Dollar in the novel "Bridge City" by Fred Rexer
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  • Wheelgun
    I bet if you compared the actual weight/handling differences between an M-77 in .300 Win Mag. and a sporter 77 in .220 Swift, you might decide there's no need to go to the expense of having that kind of conversion done. The .300 and the sporter versions of the 77 in .220 both have 24" tubes. The .300 has a heavier 'B' contour, but it also has a bigger hole than the 'A' contour barrel used on the Swift. Don't hold me to this, but I almost want to say that Ruger uses long-action receivers for the .220. If that's the case, that would bring the weight and handling aspects of the two guns you have in mind even closer....

    Do a little more research. Ya might save a few bucks. [;)]

    Mark
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  • ern98
    Besides the bolt face issue, there is also the receiver rails to consider. Magnum actions have to have the rails farther apart so that the fatter magnum rounds will feed. A standard action, like you would need for a 220swift would have the rails closer together. There even might be some issue with the ejection. I'd bet you could buy a M77 30-06 that would be very close to your 330winmag and use it as the platform to build the 220swift on. Starting from the 06 action you should have problems with feeding, ejection or bolt face.
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  • dljacko
    Thank you. I think I will act on the above advice.
    jacko.
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  • Hunter375
    Just a thought, but if you really want to build a .220 you will have an easier time with a Remington 700 Action. Or Sako. But why not just buy a factory .220?

    Save the seals-club a liberal instead.
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