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
SD, or ifSD?
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="J E Custom" data-source="post: 816350" data-attributes="member: 2736"><p>After reading your post again To make sure I understood your question I have more comments.</p><p></p><p>First- if you ask a question don't get offended, everyone has there opinion and it may be different</p><p>than yours or someone else. (It is just a discussion).</p><p></p><p>With that said, There are two diameters in a barrel, There is the bore diameter(Grove diameter)</p><p>and the land diameter (Rifling) Bore diameter is the same (Or Close) to the bullet diameter.</p><p></p><p>Land diameter is less than the bore diameter so it can engrave the bullet. This diameter may vary based on the barrel makers preference and number of rifling's/lands (2,3,5,6 and 8). they may vary</p><p>from .003 to .005 In height. Example: A 308 win would have a bore diameter of .308 and a land</p><p>diameter of .300 (.004 land height) +/- .0001 or .0002.</p><p></p><p>And yes, accuracy if at its best with a good fitting bullet but the ballistic coefficient is not changed </p><p>much by the rifling process. Sectional density is changed slightly by the bullet being compressed</p><p>in the engraving process but again ,not much.</p><p></p><p>In general the ballistic coefficient is set by the bullet maker based on the length, weight and diameter.</p><p>Shape can alter the length of a bullet of the same weight and caliber of another bullet.</p><p></p><p>There are lots of things that have to be right to have a good shooting rifle and in the long range </p><p>game everything comes into play. High ballistic coefficient's, low Standard deviations, powder densities</p><p>reloading prowess, the best barrels, perfect chambers and head space, and more.</p><p></p><p>Then add the shooters ability. </p><p></p><p>Being aware of the quality of your system is paramount to long range hunting /shooting but there </p><p>is a point of diminishing returns and some things are not worth the effort and everyone has there </p><p>own idea where that is.</p><p></p><p>Just my opinion</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 816350, member: 2736"] After reading your post again To make sure I understood your question I have more comments. First- if you ask a question don't get offended, everyone has there opinion and it may be different than yours or someone else. (It is just a discussion). With that said, There are two diameters in a barrel, There is the bore diameter(Grove diameter) and the land diameter (Rifling) Bore diameter is the same (Or Close) to the bullet diameter. Land diameter is less than the bore diameter so it can engrave the bullet. This diameter may vary based on the barrel makers preference and number of rifling's/lands (2,3,5,6 and 8). they may vary from .003 to .005 In height. Example: A 308 win would have a bore diameter of .308 and a land diameter of .300 (.004 land height) +/- .0001 or .0002. And yes, accuracy if at its best with a good fitting bullet but the ballistic coefficient is not changed much by the rifling process. Sectional density is changed slightly by the bullet being compressed in the engraving process but again ,not much. In general the ballistic coefficient is set by the bullet maker based on the length, weight and diameter. Shape can alter the length of a bullet of the same weight and caliber of another bullet. There are lots of things that have to be right to have a good shooting rifle and in the long range game everything comes into play. High ballistic coefficient's, low Standard deviations, powder densities reloading prowess, the best barrels, perfect chambers and head space, and more. Then add the shooters ability. Being aware of the quality of your system is paramount to long range hunting /shooting but there is a point of diminishing returns and some things are not worth the effort and everyone has there own idea where that is. Just my opinion J E CUSTOM [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
SD, or ifSD?
Top