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
Question on verifying velocity
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="Doom2" data-source="post: 1905065" data-attributes="member: 108323"><p>In addition to the environmental factors including consideration of mirage, one of the things that has to be understood is that the published BC, whether G1 or G7 is a representation of that factor over some velocity range, which often is undefined. Both G1 and G7 refer to drag models for specific projectiles. These model do not typically model the projectiles being shot correctly over a significant range of velocities. The G1 model is actually based on a flat based projectile while G7 is for a boat tail spitzer.</p><p></p><p>Due to the lack of sensitivity of the trajectory at shorter ranges, it is often recommended to use the published coefficient at ranges less than 600yds and adjust velocity to match dope, and to use measured velocity and adjust BC to match your dope at greater ranges.</p></blockquote><p></p>
[QUOTE="Doom2, post: 1905065, member: 108323"] In addition to the environmental factors including consideration of mirage, one of the things that has to be understood is that the published BC, whether G1 or G7 is a representation of that factor over some velocity range, which often is undefined. Both G1 and G7 refer to drag models for specific projectiles. These model do not typically model the projectiles being shot correctly over a significant range of velocities. The G1 model is actually based on a flat based projectile while G7 is for a boat tail spitzer. Due to the lack of sensitivity of the trajectory at shorter ranges, it is often recommended to use the published coefficient at ranges less than 600yds and adjust velocity to match dope, and to use measured velocity and adjust BC to match your dope at greater ranges. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Question on verifying velocity
Top