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
Neck Tension
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="vancewalker007" data-source="post: 1723537" data-attributes="member: 66917"><p>Like Jud96 said. You measure your final brass outside diameter after your last neck sizing step, then seat a bullet and do the same measure again. For example my 6.5 PRC final sizing puts my cases at .290-.2905, I seat a bullet and remeasure to find it at .292-.2925. This is essentially the basic method to check what your tension is once you have a a bushing.</p><p></p><p>You can get a rough idea of where to start by looking at the spec on your cartridge then picking a couple of bushings that will get you close to where you want to experiment. You'll never guess right the first time. Your rifle might like 3 thou or 2 thou of tension. You have to build them and shoot. Usually most people find their best groups in the 1-3 thou range. </p><p></p><p>You should not drop the neck size more than 5 thou in a step. You will always need an intermediate bushing unless you have a really tight match chamber. So on my current 6.5 setup I use a .293 to drop from a shot .297-.298 then a final .290 to get my .002 tension. I tried a .289 with several loads and it shot worse then the .290, so it's .290 for now.</p><p></p><p>It takes a little experimenting to get it right for your rifle, and you need to use the same brass manufacturer because brass varies a lot.</p></blockquote><p></p>
[QUOTE="vancewalker007, post: 1723537, member: 66917"] Like Jud96 said. You measure your final brass outside diameter after your last neck sizing step, then seat a bullet and do the same measure again. For example my 6.5 PRC final sizing puts my cases at .290-.2905, I seat a bullet and remeasure to find it at .292-.2925. This is essentially the basic method to check what your tension is once you have a a bushing. You can get a rough idea of where to start by looking at the spec on your cartridge then picking a couple of bushings that will get you close to where you want to experiment. You'll never guess right the first time. Your rifle might like 3 thou or 2 thou of tension. You have to build them and shoot. Usually most people find their best groups in the 1-3 thou range. You should not drop the neck size more than 5 thou in a step. You will always need an intermediate bushing unless you have a really tight match chamber. So on my current 6.5 setup I use a .293 to drop from a shot .297-.298 then a final .290 to get my .002 tension. I tried a .289 with several loads and it shot worse then the .290, so it's .290 for now. It takes a little experimenting to get it right for your rifle, and you need to use the same brass manufacturer because brass varies a lot. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Neck Tension
Top