Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Help!! Berger seating depth, distance to lands??
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="QuietTexan" data-source="post: 2114031" data-attributes="member: 116181"><p>Remember that he is loading VLD-style secant ogive bullets. The longer jumps are because Berger, Cal Zandt, and others have data showing that secant ogive bullets can have a wider seating depth node when set to a longer jump. The goal of this method is to find a tolerant and longer lasting CBTO setting that doesn't need to be adjusted over the life of the barrel. The goal is not to find the closest node to the lands because those tend to be narrower and can move as the throat erodes. This is not a becnhrest technique, it's a PRC technique for higher round counts where throat erosion can be measured over the course of a single match. I use it with secant ogive hunting rounds because the longer jump tends to make it easier to achieve mag length loads and reduce the chance of sticking a bullet in the bore when extracting a live round.</p><p></p><p>The notion that minimal jump is best even for tangent ogive bullets has caused issues, and Nosler has gone so far as to put a technical note on their AccuBond Long Range page that states seating at SAAMI COL provides the best accuracy. There are several treads here lately where people can't get the ABLR to group set up tight to the lands. Being up close and moving in very small increments doesn't always work.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2114031, member: 116181"] Remember that he is loading VLD-style secant ogive bullets. The longer jumps are because Berger, Cal Zandt, and others have data showing that secant ogive bullets can have a wider seating depth node when set to a longer jump. The goal of this method is to find a tolerant and longer lasting CBTO setting that doesn't need to be adjusted over the life of the barrel. The goal is not to find the closest node to the lands because those tend to be narrower and can move as the throat erodes. This is not a becnhrest technique, it's a PRC technique for higher round counts where throat erosion can be measured over the course of a single match. I use it with secant ogive hunting rounds because the longer jump tends to make it easier to achieve mag length loads and reduce the chance of sticking a bullet in the bore when extracting a live round. The notion that minimal jump is best even for tangent ogive bullets has caused issues, and Nosler has gone so far as to put a technical note on their AccuBond Long Range page that states seating at SAAMI COL provides the best accuracy. There are several treads here lately where people can't get the ABLR to group set up tight to the lands. Being up close and moving in very small increments doesn't always work. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Help!! Berger seating depth, distance to lands??
Top