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  #1  
Old 03-06-2011, 06:55 AM
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Join Date: Jan 2011
Location: Rocky Mountain House,Albertaa
Posts: 49
Seating depth? Barnes 100gr TSX


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I read somewhere on here that the Barnes TSX bullets like a jump before the lands for
optimum accuracy. I have am shooting a Rem 700.
The load I am using is 57.0 gr of RL - 22. This load is perfectly safe. No signs of excess pressure. The chronographed speed is a bit over 3400fps.
This load produces a 1.5" groupat 100 yards. I am sure it is not me as I have also shot
some 100gr Wildcat bullets mande right here in Alberta. They are flat base spitzer HP's.
They shoot in a 1/2" group.
The seating depth on both these loads is 30/1000 off the lands. I am wondering if the group will tighten up if I seat the TSX's a bit deeper? But how much deeper?
Any ideas will be greatly appreciated.
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  #2  
Old 03-06-2011, 01:14 PM
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Join Date: Nov 2005
Location: interior,alaska
Posts: 286
barnes recomends you start 50 thousands off lands.I go with 5thousandth increments,till i get within 10 thousands off lands,thats is close as I get with my hunting rifles and some not even that close because the magazine.After 10 thousands i'd 2thousands increments till you reach bore,off course your powder charge will have to change accordingly,cause your pressuregoes up with the bullet jammed against the lands and same goes if it's seated to deeply.AS far seating depth goes in general closer to the lands the more accurate the bullet ,but that is not always true as each rifle different,the throat could be long,short and other factors contribute to its accuracy.ALso some rifles don't like barnes bullets and you did't say what cal your rifle is ,Did you try different powders?
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  #3  
Old 03-06-2011, 01:40 PM
Beartooth Regular
 
Join Date: Jan 2011
Location: Rocky Mountain House,Albertaa
Posts: 49
I forgot. I am shooting a 25-06

It's a 25-06 in a Remington 700 24" barrel


Quote:
Originally Posted by hntfsh View Post
barnes recomends you start 50 thousands off lands.I go with 5thousandth increments,till i get within 10 thousands off lands,thats is close as I get with my hunting rifles and some not even that close because the magazine.After 10 thousands i'd 2thousands increments till you reach bore,off course your powder charge will have to change accordingly,cause your pressuregoes up with the bullet jammed against the lands and same goes if it's seated to deeply.AS far seating depth goes in general closer to the lands the more accurate the bullet ,but that is not always true as each rifle different,the throat could be long,short and other factors contribute to its accuracy.ALso some rifles don't like barnes bullets and you did't say what cal your rifle is ,Did you try different powders?
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  #4  
Old 03-06-2011, 02:49 PM
The Troll Whisperer (Moderator)
 
Join Date: Jan 2003
Location: Mesa, Arizona
Posts: 19,763
The standoff distance recommended by Barnes for their bullets is because of being solid material (not having a soft core) and it gives the bullet a chance to engage the rifling without being jammed up close. That will cause high pressure. A standard cup/core bullet, having a softer interior and a bit more compressibility, does not normally cause this when seated close to the lands.

Personally, I follow the bullet manufacturers recommendations even though it may result in deeper seating in the case.
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  #5  
Old 03-06-2011, 02:50 PM
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Join Date: Jul 2007
Location: north dakota
Posts: 1,484
i'd probably go about .070" off the lands... i use the 100gr tsx in a 25/06AI also in a remington 700 and it seems that is in the ballpark of where i seat mine...
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  #6  
Old 03-06-2011, 03:03 PM
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Join Date: Oct 2008
Location: California
Posts: 809
In my experience best accuracy has been in the .050 to .070 range with the Barnes X-Bullet and TSX bullets
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