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Extreme velocities?

 
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  #8  
Old 09-18-2010, 03:02 AM
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Join Date: May 2010
Posts: 9
Re: Extreme velocities?

Quote:
Originally Posted by jakelly View Post
You might just be lucky, 2919fps out of a 260 with a 24 inch barrel is quick (150+ fps I would guess), some barrels are just fast. This variance can be pretty big, like 280s that shoot same weight bullets faster than 7mm Rems, so Congratulations! that's sweet. If your anomaly has a sporter weight barrel that is a really special rig.
It's a Lothar Walther barrel with remington varmint profile and I'm not sure what that qualifies for.
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  #9  
Old 09-18-2010, 02:28 PM
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Join Date: Jul 2007
Location: terlton, oklahoma
Posts: 379
Re: Extreme velocities?

Quote:
Originally Posted by Bobby M View Post
Hi fellas!

Been a member for a while now but haven't got around to post anything until now.

I have a Rem 700 that I rebarreled a year ago from 308 to 260 and I'm getting (what I can tell) extreme velocities that kinda kicks 6,5-284 in the ass but maybe you guys can spread some light over what's doable and whats not.

Using the Hornady 140 grains SST along with 45 grains of Norma MRP gives me a velocity of 2919,95 f/s which sounds pretty high in my world, what do you more experienced 260-shooters think?

To add some details... The chamber is tight, real tight! The go-gauge fits precisely so that will probably hide some of the preassure signs. I do get some light marks on the brass from the boltface but nothing else, not one sign of preassure on the primers.


B.R.

/Bobby
I don't see where you are kicking any ass any where with the 260
with your 2919.
when I am getting 3151 fps with 140 hornady's in my 6.5x284
so you can jump down from your soap box now !

Last edited by OKIE2; 09-18-2010 at 05:27 PM.
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  #10  
Old 09-19-2010, 08:20 AM
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Join Date: May 2010
Posts: 9
Re: Extreme velocities?

Quote:
Originally Posted by OKIE2 View Post
I don't see where you are kicking any ass any where with the 260
with your 2919.
when I am getting 3151 fps with 140 hornady's in my 6.5x284
so you can jump down from your soap box now !

It wasn't my meaning to make it sound so serious, sorry for that. What I had in mind was my friends rifle which (for some reason) barely makes that kind of velocity which you guys obviously couldn't have known.

Again... Sorry for that.
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  #11  
Old 09-25-2010, 10:17 PM
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Join Date: Jul 2007
Location: terlton, oklahoma
Posts: 379
Re: Extreme velocities?

if you want speed in a 6.5 caliber get a 6.5 rem mag or a 264 mag both of these will beat all the rest. I have both of them.
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  #12  
Old 09-26-2010, 10:50 AM
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Join Date: Dec 2007
Location: SW Texas
Posts: 288
Re: Extreme velocities?

Mikecr:

What length barrel and powder is giving you 3200-3400 with a 6.5-284 and 140 grain bullet? I've never heard that speed even in a 264 mag. Maybe 3200, but 3400??
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  #13  
Old 09-26-2010, 11:30 AM
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Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,292
Re: Extreme velocities?

You're right, my bad on 3,400 with a 140, this side of military surplus powders.
Sorry
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  #14  
Old 09-26-2010, 12:16 PM
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Join Date: Oct 2007
Location: Mountians of SW NC, near Asheville
Posts: 1,596
Re: Extreme velocities?

"I do get some light marks on the brass from the boltface but nothing else,"

That IS your sign of excessive pressure. Primers are a poor indicator of anything but excessive headspace.

There is no magic that can subsitute for cubic inches. The ONLY way to get 6.5-.284 speeds from a .260 is significant excess pressure.
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