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
Hunting
Long Range Hunting & Shooting
Help setting up wife's new gun
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="RockyMtnMT" data-source="post: 1304442" data-attributes="member: 7999"><p>Feenix hit it right. SG is the stability factor. There are a couple good, easy to use calculators out there. JBM Ballistics <a href="http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi" target="_blank">JBM - Calculations - Stability</a></p><p></p><p>This is a good one and worth spending some time playing with. Temp and altitude are the biggest players in the calculation. The lower either of those get the harder it is to stabilize a bullet. Most bullets will fly accurately with an SG as low as 1.2. A bullet at this low level of stability will almost always tumble on impact. Once the stability gets up to 1.5sg it is acceptable for hunting and will deform as designed on impact as the nose stays oriented forward on impact. The higher the bullet SG is the better job it will do of staying point forward on impact and retaining the direction of travel through the target. The higher the SG gets the more likely the bullet is to stay on the intended direction through the target without veering off course. Thus it is recommended to have an SG of 2 or higher for dangerous game hunting to ensure deep straight line penetration.</p><p></p><p>In our testing bullets perform better on impact the higher the SG is. It only makes sense that a bullet will slow down its rotational force as it encounters media. As that rotational force slows the bullet will start to tip and tumble. So the faster it is spinning the longer it stays stable as it impacts. The longer it stays stable the longer it has to deform properly.</p><p></p><p>Sorry for the hijack from the original post.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 1304442, member: 7999"] Feenix hit it right. SG is the stability factor. There are a couple good, easy to use calculators out there. JBM Ballistics [url=http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi]JBM - Calculations - Stability[/url] This is a good one and worth spending some time playing with. Temp and altitude are the biggest players in the calculation. The lower either of those get the harder it is to stabilize a bullet. Most bullets will fly accurately with an SG as low as 1.2. A bullet at this low level of stability will almost always tumble on impact. Once the stability gets up to 1.5sg it is acceptable for hunting and will deform as designed on impact as the nose stays oriented forward on impact. The higher the bullet SG is the better job it will do of staying point forward on impact and retaining the direction of travel through the target. The higher the SG gets the more likely the bullet is to stay on the intended direction through the target without veering off course. Thus it is recommended to have an SG of 2 or higher for dangerous game hunting to ensure deep straight line penetration. In our testing bullets perform better on impact the higher the SG is. It only makes sense that a bullet will slow down its rotational force as it encounters media. As that rotational force slows the bullet will start to tip and tumble. So the faster it is spinning the longer it stays stable as it impacts. The longer it stays stable the longer it has to deform properly. Sorry for the hijack from the original post. Steve [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
Help setting up wife's new gun
Top