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
Help - bullet 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="Mikecr" data-source="post: 1642677" data-attributes="member: 1521"><p>Any shape can be centered, and therefore put in a concentric condition.</p><p>But if you want actual straight ammo, you'll remove any value commonly assigned to 'concentric', and focus purely on TIR.</p><p>A V-Block type runout gauge fully shows everything, and once you've removed everything, your straight ammo will also be concentric (to it's own form).</p><p></p><p>So why would you want straight ammo? It has nothing to do with any notions of alignment with bore centerline. You're chamber, throat, & ammo are rarely aligned with a bore, which is rarely straight itself. That is, while chambered, your bullet tips are not pointing at the center of muzzle.</p><p>You can have considerable runout, relative to your chamber clearances, before testing shows an affect. At some point it will, and this is due to chambered tension points caused by that runout. A chambered tension point is little different from any other tension point in a shooting system. Action issues, bedding issues, trigger issue, base issue, ring misalignment, forearm contact, your rest or hold, etc.</p><p>Straight ammo eliminates one potential here.</p><p></p><p>Where you have big chamber clearances, you're less likely to have chambered tension.</p><p>This serves many well enough, but it's also a huge contributor to the making of crooked ammo. Tight chamber clearances contribute to very straight ammo, and then your good to go again. It's relative and self perpetuating. Just understand and manage it.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1642677, member: 1521"] Any shape can be centered, and therefore put in a concentric condition. But if you want actual straight ammo, you'll remove any value commonly assigned to 'concentric', and focus purely on TIR. A V-Block type runout gauge fully shows everything, and once you've removed everything, your straight ammo will also be concentric (to it's own form). So why would you want straight ammo? It has nothing to do with any notions of alignment with bore centerline. You're chamber, throat, & ammo are rarely aligned with a bore, which is rarely straight itself. That is, while chambered, your bullet tips are not pointing at the center of muzzle. You can have considerable runout, relative to your chamber clearances, before testing shows an affect. At some point it will, and this is due to chambered tension points caused by that runout. A chambered tension point is little different from any other tension point in a shooting system. Action issues, bedding issues, trigger issue, base issue, ring misalignment, forearm contact, your rest or hold, etc. Straight ammo eliminates one potential here. Where you have big chamber clearances, you're less likely to have chambered tension. This serves many well enough, but it's also a huge contributor to the making of crooked ammo. Tight chamber clearances contribute to very straight ammo, and then your good to go again. It's relative and self perpetuating. Just understand and manage it. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Help - bullet runout
Top