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Hot Topic (More than 10 Replies) 25-20 win twist (Read 3851 times)
jhm
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25-20 win twist
Sep 10th, 2013 at 5:06am
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What is an adequate twist for 85 to 100 gr bullets in the 25-20 Win?

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firearmdoc
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Re: 25-20 win twist
Reply #1 - Sep 10th, 2013 at 6:17am
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A 1-10 twist will stabilize anything you will be shooting.

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Re: 25-20 win twist
Reply #2 - Sep 10th, 2013 at 7:12am
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firearmdoc wrote on Sep 10th, 2013 at 6:17am:
A 1-10 twist will stabilize anything you will be shooting.
Jesse

+1 Mine has a gain twist that ends 1-10".
  
Glenn - Stevens 044 1/2, Bartlein SS 5R barrel in 22LR
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jhm
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Re: 25-20 win twist
Reply #3 - Sep 10th, 2013 at 5:56pm
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Thanks guys. One in 10 it is.


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QuestionableMaynard8130
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Re: 25-20 win twist
Reply #4 - Sep 10th, 2013 at 7:01pm
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what twist do the quarter-bored guys use who are shooting the longer heavier bullets for group @ 200.
  
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Jerry_H
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Re: 25-20 win twist
Reply #5 - Sep 11th, 2013 at 1:37am
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I use a 10 twist Douglas XX with my 120 grain Mos bullet. At 1660 fps it shows no signs of tipping at 200 yards. It also shoots pretty good, if I keep my head on straight.

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40_Rod
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Re: 25-20 win twist
Reply #6 - Sep 11th, 2013 at 8:01am
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I am using a Smith gain twist barrel it ends in a 1 : 91/2" twist. It stabilizes the Mos 120 Gr. bullet well.

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Re: 25-20 win twist
Reply #7 - Sep 11th, 2013 at 8:16am
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40 Rod - Haven't started casting with my 120gr Mos as of yet. Any tricks to doing so with so small a bullet? What alloy are you using? Thanks.
  
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Re: 25-20 win twist
Reply #8 - Sep 12th, 2013 at 8:31am
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I am using 1 : 20 it shoots very well. As far as tricks all molds have their own personalities. My experience is that I had to decrease my pot temperature a little and cast a little faster that I do with my 32s. The key is to balance 3 things. To get the temperature so that you can cut the sprue without tearing, have it drop from the mold consistently, and have the weight of each bullet be within .02 of a grain from start to finish. Keep good notes once you find the right combination. 
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Re: 25-20 win twist
Reply #9 - Sep 12th, 2013 at 11:53am
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40_Rod wrote on Sep 12th, 2013 at 8:31am:

..., and have the weight of each bullet be within .02 of a grain from start to finish. 
...


I'll have to get a better scale - something that will resolve to 0.01 grain at least.

  
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Re: 25-20 win twist
Reply #10 - Sep 12th, 2013 at 12:37pm
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Cat_Whisperer wrote on Sep 12th, 2013 at 11:53am:
40_Rod wrote on Sep 12th, 2013 at 8:31am:

..., and have the weight of each bullet be within .02 of a grain from start to finish. 
...


I'll have to get a better scale - something that will resolve to 0.01 grain at least.


I'm good with the 20:1 and also have some 16:1, but the 0.02gr is a bit tight on my scale. Unless I upgrade (which I'm probably going to do - another $130 gone), it will have to be 0.1gr.
Thanks.
  
Glenn - Stevens 044 1/2, Bartlein SS 5R barrel in 22LR
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