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
OAL and TTL IMPoRTANCE??
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="Bart B" data-source="post: 645934" data-attributes="member: 5302"><p>Note that with rimless bottleneck cases (and some belted bottleneck ones) that chamber easily, the spread in head to shoulder measurement will also be imparted to the bullet's jump to rifling contact. Shorter ones have less bullet jump, longer ones less. Such cases have their shoulders pressed hard into the chamber shoulder when the round fires. </p><p></p><p>And, depending on how much shoulder setback there is from firing pin impact slamming the case shoulder into the chamber shoulder, that dimension will be subtracted from the bullet jump to rifling distance. The case head's off the bolt face a few thousandths when this happens. </p><p></p><p>It's an absolute mishmash of things that's impossible to control to very small tolerances. But in the most accurate rifles, it doesn't seem to matter one bit.</p></blockquote><p></p>
[QUOTE="Bart B, post: 645934, member: 5302"] Note that with rimless bottleneck cases (and some belted bottleneck ones) that chamber easily, the spread in head to shoulder measurement will also be imparted to the bullet's jump to rifling contact. Shorter ones have less bullet jump, longer ones less. Such cases have their shoulders pressed hard into the chamber shoulder when the round fires. And, depending on how much shoulder setback there is from firing pin impact slamming the case shoulder into the chamber shoulder, that dimension will be subtracted from the bullet jump to rifling distance. The case head's off the bolt face a few thousandths when this happens. It's an absolute mishmash of things that's impossible to control to very small tolerances. But in the most accurate rifles, it doesn't seem to matter one bit. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
OAL and TTL IMPoRTANCE??
Top