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watchthewind
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.25 Caliber?
Sep 13th, 2017 at 10:39pm
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Greetings Folks,
So I just had a buddy ask me about .25 Caliber chambering D and rates of twist in barrels. I'm not too up on my .25 Cal. What suggestions would you guys have?
Thank You,
Scott
  

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bnice
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Re: .25 Caliber?
Reply #1 - Sep 13th, 2017 at 10:56pm
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at least a 1 in 10 twist. I have 25-20 SS, 25 WCF and 25 hornet, also had a 25 Schuetzen all shoot really well. The Schuetzen would probably be ok now with 327 federal mag brass but 32 H&R mag was to weak. I would probably go with a 1 in 9 twist if available (my hornet is) so I could stabilize 120+ bullets at a lower velocity. JMO
  
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JerryH
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Re: .25 Caliber?
Reply #2 - Sep 13th, 2017 at 11:12pm
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A 10 twist Douglas XX barrel is what I use, chambered in 25-20 WCF. It works well with a 120 gr. Mos bullet.  With the 25-20 WCF you do need to use R-P brass if you're going to run 1650 fps +.

The 25-20 SS is a good one too. I know of two 25-20 SS rifles here locally that are very competitive. One of them won the ISSA Regional at Modesto in 2016.

There is also a .25 Hornet at Modesto that has shot some really good targets. But that chambering will take you out of the Traditional Class, if that matters.

JerryH

« Last Edit: Sep 14th, 2017 at 12:12am by JerryH »  

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bpjack
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Re: .25 Caliber?
Reply #3 - Sep 14th, 2017 at 11:46am
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My 10 twist McGowan barrel on my 25-20 low wall stabilizes the 117 gr NOE pointed bullet just fine.  Shoots well for me.  May not be Modesto accurate though  Grin

Jack
  

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bnice
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Re: .25 Caliber?
Reply #4 - Sep 14th, 2017 at 12:00pm
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I left off that I have a mix of Douglas and RKS barrels on the mentioned 25's
  
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frnkeore
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Re: .25 Caliber?
Reply #5 - Sep 14th, 2017 at 12:03pm
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I did some research, a while back, for one of our members and came up with this info, regarding 25/20SS & 25/20 WCF cases.

The water weight capacity of my cases is as follows:

Reminton brand 25/20 WCF = 19.3

Jamison brand 25/20 SS = 19.0

In CC's that is Rem 25/20 WCF = 1.178 cc and Jamison 25/20SS = 1.160 cc

By that, you should be able to use the higher pressure loads in the 25/20 Jamison and maybe reduce them by .1 gr but, the Jamison case is longer so, you loose 5/16 of barrel length, because of case length difference. You might loose 2 - 5 fps with the shorter barrel travel.

Frank
  

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bullshop
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Re: .25 Caliber?
Reply #6 - Sep 15th, 2017 at 12:13pm
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So why not a 25-35 ?  Too much case volume ?
  
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frnkeore
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Re: .25 Caliber?
Reply #7 - Sep 15th, 2017 at 12:19pm
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bullshop wrote on Sep 15th, 2017 at 12:13pm:
So why not a 25-35 ?  Too much case volume ?


Yes, as well as not much developement work.

Frank
  

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Re: .25 Caliber?
Reply #8 - Sep 15th, 2017 at 12:36pm
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Frank, The .25 Hornet must be awfully close to those 2.  Do you know it's numbers?
  

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frnkeore
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Re: .25 Caliber?
Reply #9 - Sep 15th, 2017 at 1:12pm
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Bob,
I don't have any 25 Hornet cases to measure. I do have 22 Hornet cases. I could expand one to .260 and measure it but, it wouldn't be the same as a 25 Hornet chamber.

My guess is that the 25 Hornet would be in the 1.1 CC range max. A straight hole .260 in diameter, for a length of 1.22 (Hornet case 1.4 minus .18 solid head) = 1.06 CC.

Frank
  

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Schuetzenmiester
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Re: .25 Caliber?
Reply #10 - Sep 15th, 2017 at 1:20pm
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Yes I do.  Want one to add to your data base?
  

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frnkeore
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Re: .25 Caliber?
Reply #11 - Sep 15th, 2017 at 2:17pm
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It would be better if someone would send me a fired, 25 Hornet case but, give me a week and I'll get a 22 expanded to 25.

Frank
  

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Re: .25 Caliber?
Reply #12 - Sep 15th, 2017 at 4:14pm
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I have fired .25 Hornets.  PM an address.
  

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Schuetzendave
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Re: .25 Caliber?
Reply #13 - Sep 17th, 2017 at 4:58pm
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.25 RKS (same case as .32 RKS) - can only breech seat

9:1 RKS gain twist barrel

122 grain Paul Jones spitzer @ 1,600 fps
  
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