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
How do you eliminate runout
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="dougduey" data-source="post: 1913164" data-attributes="member: 33159"><p>Welcome to this rabbit hole I'll give you my personal experience, and you can determine if it will be helpful to you. </p><p>One of the best ways to obtain concentricity is by proper seating depth of the bullet. You want the bullet base or base/boat tail junction to be at the brass case neck/ shoulder junction. Besides giving you very little runout, this tends to be a perfect seating depth (I've done a ton of seating depth tests and 9/10 end up being this COAL). </p><p>Next is the neck tension issue. Fired brass will need to be annealed usually after 3 firings to keep the neck tension consistent. I use the Redding Type S bushing with the bushing that sets tension to either 0.002 or 0.003. I get perfect tension using the Sinclair Neck Turning Mandrels because they are exactly 0.002. If you want 0.001, then use the Expanding mandrels. I do this on all the virgin brass. Running the mandrels through the necks creates a uniform inside diameter at pushes the "thicker" area of the brass to the outside. You can choose to neck turn to clean up the outsides if you want, but I haven't found any noticeable difference. </p><p>I learned this method from Remmy700 on this site. It has dropped my ES and SD numbers.......most are single digit now. When I check run out, it's either 0 or 0.001. </p><p>I do own many Lee Collect Neck Dies and they are wonderful.</p></blockquote><p></p>
[QUOTE="dougduey, post: 1913164, member: 33159"] Welcome to this rabbit hole I’ll give you my personal experience, and you can determine if it will be helpful to you. One of the best ways to obtain concentricity is by proper seating depth of the bullet. You want the bullet base or base/boat tail junction to be at the brass case neck/ shoulder junction. Besides giving you very little runout, this tends to be a perfect seating depth (I’ve done a ton of seating depth tests and 9/10 end up being this COAL). Next is the neck tension issue. Fired brass will need to be annealed usually after 3 firings to keep the neck tension consistent. I use the Redding Type S bushing with the bushing that sets tension to either 0.002 or 0.003. I get perfect tension using the Sinclair Neck Turning Mandrels because they are exactly 0.002. If you want 0.001, then use the Expanding mandrels. I do this on all the virgin brass. Running the mandrels through the necks creates a uniform inside diameter at pushes the “thicker” area of the brass to the outside. You can choose to neck turn to clean up the outsides if you want, but I haven’t found any noticeable difference. I learned this method from Remmy700 on this site. It has dropped my ES and SD numbers.......most are single digit now. When I check run out, it’s either 0 or 0.001. I do own many Lee Collect Neck Dies and they are wonderful. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
How do you eliminate runout
Top