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 turning.
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="dok7mm" data-source="post: 2783098" data-attributes="member: 90080"><p>I just turned 150 pieces of Peterson 7mm Rem Mag brass for a friend. We measured to come up with a start of </p><p>.0135" turn. We fired a couple and we couldn't slide a bullet in the fired case, so turned them to .0132" and fired them again. With pressure we could push a bullet into the fired case. I set up for a turn of .0130" and the bullet slid in the fired neck easily. He fireformed 50 rounds today and was very happy. Every 5 shot target was under an inch with no load work up. He had little powder on neck, nothing on shoulder.</p><p></p><p>I'll use how I turned it to help you.</p><p></p><p>I started with my reamer print, we both use, the neck ID is .3145". Step 2 is subtracting .284, the bullet diameter. That leaves .0305". Then subtract the .004" clearance I want to use - that leaves .0265" . Lastly, divide by 2 for the 2 sides of the neck. That gives the neck thickness .0130". I measure each case at 4 points, they should be the exact thickness, if you are doing it right.</p><p></p><p>I turn necks on 9 hunting rifles and depending on caliber, neck ID or brass thickness, I always end up with .0300" to .0140" turn . I have turned over 5000 cases over many years, but I know what the chamber neck ID and brass (I already have in hand) + neck thickness to start.</p><p></p><p>I think the turn itself is generally to enable release the bullet cleanly, be it the chamber or the neck thickness.</p><p>I also believe the turn offers more concentric release into the lands, therefore giving some level of accuracy.</p><p></p><p>Is it necessary? No! Millons are shooting well with never turning. It's just a extra step towards fitting brass to your chamber.</p></blockquote><p></p>
[QUOTE="dok7mm, post: 2783098, member: 90080"] I just turned 150 pieces of Peterson 7mm Rem Mag brass for a friend. We measured to come up with a start of .0135" turn. We fired a couple and we couldn't slide a bullet in the fired case, so turned them to .0132" and fired them again. With pressure we could push a bullet into the fired case. I set up for a turn of .0130" and the bullet slid in the fired neck easily. He fireformed 50 rounds today and was very happy. Every 5 shot target was under an inch with no load work up. He had little powder on neck, nothing on shoulder. I'll use how I turned it to help you. I started with my reamer print, we both use, the neck ID is .3145". Step 2 is subtracting .284, the bullet diameter. That leaves .0305". Then subtract the .004" clearance I want to use - that leaves .0265" . Lastly, divide by 2 for the 2 sides of the neck. That gives the neck thickness .0130". I measure each case at 4 points, they should be the exact thickness, if you are doing it right. I turn necks on 9 hunting rifles and depending on caliber, neck ID or brass thickness, I always end up with .0300" to .0140" turn . I have turned over 5000 cases over many years, but I know what the chamber neck ID and brass (I already have in hand) + neck thickness to start. I think the turn itself is generally to enable release the bullet cleanly, be it the chamber or the neck thickness. I also believe the turn offers more concentric release into the lands, therefore giving some level of accuracy. Is it necessary? No! Millons are shooting well with never turning. It's just a extra step towards fitting brass to your chamber. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Neck turning.
Top