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I have a stock and a new HB ready to go for a .220 swift. In looking for a short action (Remington 700) I came across a .243.. What mods will have to be done to to the .243 action to make it work in my .220,, Thanks Dave
The Swift's case is 2.205" long. The .243's is 2.045" long. You'll have to lengthen the mag well a bit.
Remington's site is decidedly quiet about receiver lengths.
Case length has nothing to do with anything except ejection.
It is the OAL of the loaded round you need to be concerned with.
As I already posted, that difference is .030".
Case head size is the same .473" on both.
Mag box length on the short action should be 2.850", as compared to the Swifts 2.680" OAL loaded length.
The standard action magazine is 3.350", and the Magnum action magazine is 3.700".
If at all possible, I would suggest you take a .220 Swift round and see for yourself if it will fit in the .243 magazine, and also see if it will extract & eject.
If your not a gunsmith with all the re-barreling tools stop right now. You will need headspace no-go guage or some use a factory new loaded round and a go guage for headspacing. If the bolt closes on a no-go you'll have to shorten the threads on the barrel or if the bolt doesn't close on a go guage you'll need to ream the chamber. If this confuses you, than leave it to a qualified gunsmith. Barrel change is a lot harder than screwing a nut on a bolt.
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