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260 barrel length

 
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  #1  
Old 07-04-2013, 11:42 AM
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Location: Central Ohio
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260 barrel length

Have done a lot of searching of post and can't find answer I'm looking for:
What would be minimum barrel length to push 140 hybrids to 3000+ fps out of a
.260 without having to push pressure limit of an action? Planning on using a short action but not worried about oal length as will probably single load anyways.
Thanks, Jeff
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  #2  
Old 07-04-2013, 11:50 AM
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Re: 260 barrel length

26" on almost all of my rifles
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  #3  
Old 07-04-2013, 12:14 PM
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Re: 260 barrel length

Quote:
Originally Posted by 375fan View Post
Have done a lot of searching of post and can't find answer I'm looking for:
What would be minimum barrel length to push 140 hybrids to 3000+ fps out of a
.260 without having to push pressure limit of an action? Planning on using a short action but not worried about oal length as will probably single load anyways.
Thanks, Jeff
I have 26" barrels on all of my 6.5's. Though I tend to agree that 26" is a good starting point for best performance from the 6.5's, I think you will have to go to at least a 30" barrel to get anywhere near the velocity you are chasing. Even then, you are going to have to push pressures to get to a level that is not likely to be anywhere near 3000 fps.

3000+ from a .260 case? With 140's? Without pressure? Even a 6.5-284 has to be pushed hard to get there. If you do it from a .260 case, you are not going to do it at anything near sane pressure levels.

Do yourself a favor and re-think either your desired case capacity or your velocity goals. They are not compatible.
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  #4  
Old 07-04-2013, 12:14 PM
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Posts: 102
Re: 260 barrel length

No way can I hit 3k out of my 260 with a Krieger 28" 8.5 twist at 550'.Running the 140 berger Hybrids with 44gr of H4350 and SMK 142gr with 44.3gr of H4350 I get 2850fps out of both loads with a es 10-11.The 44.3gr load is hard on the brass.
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  #5  
Old 07-04-2013, 12:15 PM
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Re: 260 barrel length

I don't know that even 28-30" would get you there without exceeding SAAMI max.
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  #6  
Old 07-04-2013, 03:03 PM
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Re: 260 barrel length

Unless you are shooting at least a 26" barrel you have to push a 264 Win Mag a little to get 3000 fps with 140 gr bullets.
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  #7  
Old 07-05-2013, 01:13 AM
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Location: California Central Cost
Posts: 737
Re: 260 barrel length

You can't get there from here.
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