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
Rifles, Bullets, Barrels & Ballistics
Measuring Powder Temperature
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="willo" data-source="post: 889241" data-attributes="member: 74599"><p>For those using powder temperature as an input in any particular ballistic calculations, can you explain how you determine your temperature input? The reason I ask is unless there is a measured correlation of thermal conductance between brass (or cartridge) and powder any temperature input is invalid and results in vastly variable inputs. </p><p></p><p>A lot of people will tell you to put ammunition on 'ice' and as a subsequent action record a 0 degree celsius input for temperature when zeroing for instance. The problem is both brass and particularly annealed brass and powder have unique heat transfer properties which would need to incorporate conductance formulas from ice to brass to powder for instance. </p><p></p><p>As a simply test using a RUAG .338 SWISS P cartridge in the freezer overnight and with the use of a calibrated laser thermometer, removing the powder from the cartridge the following morning only recorded 16 degrees celsius. Powder on its own in the freezer recorded 1-2 degree celsiuis.</p><p></p><p>Have others experienced something similar?</p></blockquote><p></p>
[QUOTE="willo, post: 889241, member: 74599"] For those using powder temperature as an input in any particular ballistic calculations, can you explain how you determine your temperature input? The reason I ask is unless there is a measured correlation of thermal conductance between brass (or cartridge) and powder any temperature input is invalid and results in vastly variable inputs. A lot of people will tell you to put ammunition on 'ice' and as a subsequent action record a 0 degree celsius input for temperature when zeroing for instance. The problem is both brass and particularly annealed brass and powder have unique heat transfer properties which would need to incorporate conductance formulas from ice to brass to powder for instance. As a simply test using a RUAG .338 SWISS P cartridge in the freezer overnight and with the use of a calibrated laser thermometer, removing the powder from the cartridge the following morning only recorded 16 degrees celsius. Powder on its own in the freezer recorded 1-2 degree celsiuis. Have others experienced something similar? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Measuring Powder Temperature
Top