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
Barrel length vs. powder burn
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="Susquatch" data-source="post: 1614257" data-attributes="member: 31264"><p>So just to be clear, I usually go with accuracy too. However, this is a "Long Range" forum so accuracy needs some defining. You really can't take accuracy at 100 yards and translate that to accuracy at 1000 because SD and velocity starts to play a much more significant role at longer distances. </p><p></p><p>Let's take the example that CanHunter suggested and allow me some liberties using his example.</p><p></p><p>For the 3/8 load at 2950, the linear extrapolation of 3/8" at 100 out to 1000 yards yields a 3.75" group. And the 3250 0.75" group yields a 7.25" group. On that basis, the 3/8 appears to be the clear winner. </p><p></p><p>However, if the 3/8 group has a hypothetical SD of 10fps, the SD adds another 4.4" of group size solely due to the difference in the group size caused by the shot to shot velocity difference! So the 3/8 group actually prints 8.2 at 1000.</p><p></p><p>If the SD on the 3250 is zero (just to make the point), then the group size will be 7.25 at 1000.</p><p></p><p>Even though the slower load has a group that is half that of the faster load, the faster load actually out shoots the slower load at 1000.</p><p></p><p>I only used the same numbers that CanHunter used. In reality, the faster load will not have zero SD, and wind and other factors will amplify the effect. </p><p></p><p>But the point is that short range accuracy isn't as important at long range as is velocity and SD. So, if I'm hunting at long range, I might prefer a high velocity low SD load over a smaller group at lower velocity and higher SD. </p><p></p><p>I could easily pick loads that show this effect to a much greater degree. I just used what I was given. </p><p></p><p>The bottom line is that you have to shoot the rifle at the ranges and conditions you plan to hunt in if you really want to know which load is best.</p></blockquote><p></p>
[QUOTE="Susquatch, post: 1614257, member: 31264"] So just to be clear, I usually go with accuracy too. However, this is a "Long Range" forum so accuracy needs some defining. You really can't take accuracy at 100 yards and translate that to accuracy at 1000 because SD and velocity starts to play a much more significant role at longer distances. Let's take the example that CanHunter suggested and allow me some liberties using his example. For the 3/8 load at 2950, the linear extrapolation of 3/8" at 100 out to 1000 yards yields a 3.75" group. And the 3250 0.75" group yields a 7.25" group. On that basis, the 3/8 appears to be the clear winner. However, if the 3/8 group has a hypothetical SD of 10fps, the SD adds another 4.4" of group size solely due to the difference in the group size caused by the shot to shot velocity difference! So the 3/8 group actually prints 8.2 at 1000. If the SD on the 3250 is zero (just to make the point), then the group size will be 7.25 at 1000. Even though the slower load has a group that is half that of the faster load, the faster load actually out shoots the slower load at 1000. I only used the same numbers that CanHunter used. In reality, the faster load will not have zero SD, and wind and other factors will amplify the effect. But the point is that short range accuracy isn't as important at long range as is velocity and SD. So, if I'm hunting at long range, I might prefer a high velocity low SD load over a smaller group at lower velocity and higher SD. I could easily pick loads that show this effect to a much greater degree. I just used what I was given. The bottom line is that you have to shoot the rifle at the ranges and conditions you plan to hunt in if you really want to know which load is best. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Barrel length vs. powder burn
Top