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 and max bullet grip force
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="Mikecr" data-source="post: 2134781" data-attributes="member: 1521"><p>#1 Interference fit is not tension. </p><p>Think about it for a second: tension is a force, if you could measure it, what unit of measure would result?</p><p>Would it be in inches or pounds?</p><p></p><p>#2 Seating force/friction does not directly correlate with tension, if at all. </p><p>You can lap bullets and neck IDs to dry white metal finish, observe very <u>high</u> seating forces because of this, and yet you will see zero affect of this action to load or MV.</p><p>You can coat bullets and Neck IDs in WS2 (tungsten) which holds the lowest dry film friction coefficient, observe very <u>low</u> seating forces because of this, and still see zero affect to load or MV.</p><p></p><p>#3 Bullets are neither pulled nor pushed from necks on firing. </p><p>The seating force test described at #2 debunks this notion as well.</p><p>Also, JFYI, pull force is usually higher than seating force -for less than mythical reasons.</p><p></p><p>Reality: Bullets are gripped by springback force against (X) area of seated bearing. </p><p>The gripping force is pounds per square inch.</p><p>Change LENGTH of neck sizing, given same seated bullet bearing, same interference, and same friction. </p><p>Observe that this does affect MV. In fact, it's a direct adjustment.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2134781, member: 1521"] #1 Interference fit is not tension. Think about it for a second: tension is a force, if you could measure it, what unit of measure would result? Would it be in inches or pounds? #2 Seating force/friction does not directly correlate with tension, if at all. You can lap bullets and neck IDs to dry white metal finish, observe very [U]high[/U] seating forces because of this, and yet you will see zero affect of this action to load or MV. You can coat bullets and Neck IDs in WS2 (tungsten) which holds the lowest dry film friction coefficient, observe very [U]low[/U] seating forces because of this, and still see zero affect to load or MV. #3 Bullets are neither pulled nor pushed from necks on firing. The seating force test described at #2 debunks this notion as well. Also, JFYI, pull force is usually higher than seating force -for less than mythical reasons. Reality: Bullets are gripped by springback force against (X) area of seated bearing. The gripping force is pounds per square inch. Change LENGTH of neck sizing, given same seated bullet bearing, same interference, and same friction. Observe that this does affect MV. In fact, it's a direct adjustment. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Neck tension and max bullet grip force
Top