Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Extreme velocities?

 
LinkBack Thread Tools Display Modes
  #1  
Old 09-16-2010, 02:48 AM
Junior Member
 
Join Date: May 2010
Posts: 9
Extreme velocities?

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
Reply With Quote
  #2  
Old 09-16-2010, 10:58 AM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,296
Re: Extreme velocities?

Haven't run QL on it, but it doesn't seem high to me.
And it's nowhere near 6.5x284 velocity capabilities(3200-3400fps).
Reply With Quote
  #3  
Old 09-16-2010, 04:56 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,501
Re: Extreme velocities?

[QUOTE=Bobby M;423994]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.




The velocity is about right for the 260 with 140 grain bullets but watch for ejector marks on
the case head (A 1/8" bright spot).

If there is any signs of this just back off 1/2 to 1 grain of powder.

Sounds Like you are ok.

J E CUSTOM
__________________
"PRESS ON"
Reply With Quote
  #4  
Old 09-16-2010, 07:08 PM
Platinum Member
 
Join Date: Jan 2008
Location: SOCIALIST CONTROLLED TERRITORY OF NEW YORK
Posts: 4,391
Re: Extreme velocities?

Sounds ok to me I was pushing 2950 in a 27" barrel with 140g amax and H4350.
__________________
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf"
If you want to shoot Bergers start here!
http://www.longrangehunting.com/arti...accuracy-1.php
Reply With Quote
  #5  
Old 09-16-2010, 08:56 PM
Silver Member
 
Join Date: Sep 2010
Location: Wolf Point, MT
Posts: 279
Re: Extreme velocities?

How long is the barrel?
Reply With Quote
  #6  
Old 09-17-2010, 02:30 AM
Junior Member
 
Join Date: May 2010
Posts: 9
Re: Extreme velocities?

Hi again!


@Mikecr - Perhaps it's just my friends that doesn't use the right powders or something.

@J E Custom - Thanks a bunch! I did get some marks from the ejector so I took your advise but even before you gave it and backed down to 43 grains cause the ES was almost as good as at 45 grains. In between gave really ****** ES.

@ICANHITHIMMAN - Thanks!

@jakelly - It's 24"

Perhaps it's just us swedes that are a little bit cautious since both 6,5-284 and 6,5-06 users have been complaining about me overloading since I get similar velocities that they do. Åke Nilsson at Norma wrote me that my load gives theoretically 4500-4600 bars of preassure which is a bit too much.

Maybe it is a powder issue since we have problems getting the right stuff over here or what do you guys think?

The preasure signs that I look for is marks on the case head and of course if the bolt is hard to open.



/Bobby

Last edited by Bobby M; 09-17-2010 at 03:46 AM.
Reply With Quote
  #7  
Old 09-18-2010, 01:11 AM
Silver Member
 
Join Date: Sep 2010
Location: Wolf Point, MT
Posts: 279
Re: Extreme velocities?

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.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Extreme velocities?
Thread Thread Starter Forum Replies Last Post
7mm mag velocities Gurnz Rifles, Bullets, Barrels and Ballistics 3 07-23-2011 05:36 PM
7 mm wsm velocities jmason Reloading 4 10-11-2010 10:15 PM
7MM Velocities Tumbleweed Rifles, Bullets, Barrels and Ballistics 8 07-25-2009 10:40 PM
Velocities please 4ked Horn Rifles, Bullets, Barrels and Ballistics 0 10-26-2004 09:45 PM
300 RUM 220, 240 gr SMK velocities. *WyoWhisper* Rifles, Bullets, Barrels and Ballistics 6 01-18-2002 08:57 AM


All times are GMT -5. The time now is 04:30 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC