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.220 Swift

 
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  #1  
Old 12-02-2008, 10:08 AM
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.220 Swift

Hello, I have a pre-'64 220 Swift model 70 hunter grade with a 26" barrel. Does anyone know for sure what twist the barrel has? The throat seems to be extremely long (eroded?) and the only bullet I have tried that will produce a .030" jump to the lands is the Nosler 69gr custom competition. I was wondering if the 220 would be able to stabilize this bullet. Probably going to load @ about 3100 fps.

Thanks for the info.
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  #2  
Old 12-02-2008, 08:57 PM
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Re: .220 Swift

Quote:
Originally Posted by bowhunthard View Post
Hello, I have a pre-'64 220 Swift model 70 hunter grade with a 26" barrel. Does anyone know for sure what twist the barrel has? The throat seems to be extremely long (eroded?) and the only bullet I have tried that will produce a .030" jump to the lands is the Nosler 69gr custom competition. I was wondering if the 220 would be able to stabilize this bullet. Probably going to load @ about 3100 fps.

Thanks for the info.

Probably not .

Most of the early 220 swifts and 22/250s were 1 in 14 twist for 45 to 55gr @ 3700ft/sec +
They did not make the heavy bullets back then.

If your wanting to shoot 70gr bullets @3100 you will need a 1 in 7 or 1 in 8 twist
and you might get buy with a 1 in 9.

Also the throat is longer normaly because in there day these were very hot loads.

Don't worry to much about freebore ! Just fire form your brass and neck size only
and it will supprize you how well it will shoot unless the barrel is used up.

J E CUSTOM
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  #3  
Old 12-03-2008, 02:13 PM
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Re: .220 Swift

I have another post here, I shot 2 different loads with same bullets. See results a the link below.

You were right tho, bullets keyholed beautifully @ 100 yds:(.

69 gr Nosler CC
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  #4  
Old 12-04-2008, 06:22 PM
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Re: .220 Swift

try 36 to 38 grains of 4064 with the 55 Vmax. All the swifts I have shot love that combo !

good luck.
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Old 12-06-2008, 05:04 PM
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Re: .220 Swift

Quote:
Originally Posted by bowhunthard View Post
Hello, I have a pre-'64 220 Swift model 70 hunter grade with a 26" barrel. Does anyone know for sure what twist the barrel has? The throat seems to be extremely long (eroded?) and the only bullet I have tried that will produce a .030" jump to the lands is the Nosler 69gr custom competition. I was wondering if the 220 would be able to stabilize this bullet. Probably going to load @ about 3100 fps.

Thanks for the info.
Here's a tip given to me by an old Gunsmith friend . When your old slow twist Swift appears to be burned out , try some 60 Gr. Hornady HPs . This worked for me in a very early Ruger M77 Swift . It also worked well on windy days for Pdogs . Buy a box and try 'em !
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  #6  
Old 12-29-2008, 02:14 PM
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Re: .220 Swift

Hey guys,

Thanks for the advice, I'm loading 52gr AMAXes now over Varget. Haven't shot them yet tho.

Here's some pics of the gun.

http://varmintxt.webs.com/win70hg.htm
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  #7  
Old 01-07-2009, 09:15 PM
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Re: .220 Swift

It couldn't be eaiser to measure the twist rate. Just start your cleaning rod with a brush into the barrel from the breach. Once the brush and rod combo are in the barrel a few inches, put a visible mark on your cleaning rod to show a start position against the action. Also put a length wise mark somewhere near the handle of the cleaning rod so you can count the revolutions.
It is very, very important to be sure the rod spins free and you don't have your hand on it keeping it from spining freely in the bore so grab the handle only. Next slowly push your cleaning rod into the barrel and stop when the rod spins one complete revolution. Now, put another mark on your cleaning rod at the same point by the action and remove the cleaning rod. Now measure the distance between the marks and that is how many inches between twists, or your twist rate. For instance, if you measure 14 inches between marks, you have a 1 in 14 inch twist.
Hope this helps.
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