Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
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
.
Forums
The Range
Ammo & Reloading
Question on .308 neck expansion
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="swampratt" data-source="post: 3837068" data-attributes="member: 15054"><p>I will eventually get to the answer of that question.</p><p></p><p>My .308 and my other bottle necked rifle cases all get annealed after the first depriming and cleaning.</p><p>Then necks get brushed out with a NYLON bore brush or worn bore brush with 0000 steel wool wrapped around it.</p><p></p><p>After annealing your inside case necks get some kind of carburizing which makes the inside of the necks very rough.</p><p>Take some dial calipers and measure the necks inside diameter and while you are measuring that slowly spin the case in your fingers and you can feel the roughness.</p><p></p><p>Brush the necks and that roughness goes away.</p><p>Result is less pressure or drag when sizing.</p><p></p><p>Now lube inside the necks. it does not take much ..you can run a lubed finger over the case mouth or </p><p>rotate a Qtip into the lube and rotate it slightly around the case mouth.</p><p></p><p>After sizing i wipe out the case neck with a Qtip.</p><p>I do not tumble again and I also wipe the outside of the case down.</p><p>I go through a lot of paper towels or terry cloth towels.</p><p></p><p>I save the paper towels for fire starter.</p><p></p><p>Now Very Important.... If I do not lube every case the same I will have different shoulder Ogive measurements.</p><p></p><p>If you have more drag on the upstroke you will pull that shoulder farther forward.</p><p></p><p>If you measure things to the .001" you will see what I am talking about.</p><p>I want to size my case as little as possible (Bolt Gun) so my dies do not move any dimensions on the case more than .002" from fired except for the neck of course.</p><p></p><p>I have done brass fail tests and can get 50+ reloads from full length sized cases in .308.</p><p>Not winchester cases though that is about 18 reloads.. they are thin.</p><p>Stupid accurate though.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3837068, member: 15054"] I will eventually get to the answer of that question. My .308 and my other bottle necked rifle cases all get annealed after the first depriming and cleaning. Then necks get brushed out with a NYLON bore brush or worn bore brush with 0000 steel wool wrapped around it. After annealing your inside case necks get some kind of carburizing which makes the inside of the necks very rough. Take some dial calipers and measure the necks inside diameter and while you are measuring that slowly spin the case in your fingers and you can feel the roughness. Brush the necks and that roughness goes away. Result is less pressure or drag when sizing. Now lube inside the necks. it does not take much ..you can run a lubed finger over the case mouth or rotate a Qtip into the lube and rotate it slightly around the case mouth. After sizing i wipe out the case neck with a Qtip. I do not tumble again and I also wipe the outside of the case down. I go through a lot of paper towels or terry cloth towels. I save the paper towels for fire starter. Now Very Important.... If I do not lube every case the same I will have different shoulder Ogive measurements. If you have more drag on the upstroke you will pull that shoulder farther forward. If you measure things to the .001" you will see what I am talking about. I want to size my case as little as possible (Bolt Gun) so my dies do not move any dimensions on the case more than .002" from fired except for the neck of course. I have done brass fail tests and can get 50+ reloads from full length sized cases in .308. Not winchester cases though that is about 18 reloads.. they are thin. Stupid accurate though. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
The Range
Ammo & Reloading
Question on .308 neck expansion
Search titles only
By:
Top
Bottom