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
Trying to lower ES in .260 AI
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="dsculley" data-source="post: 1224553" data-attributes="member: 77514"><p>So you have a quandary, do I believe my chronograph or my target? Personally, if I were shooting .1 " to .2" 10 shot groups consistently I would not care what my chronograph said. Sounds like it is time to stretch its legs and see how it performs at distance. If it shoots that well at 100 yds, it should shoot well at distance.</p><p></p><p>Just for fun, if you can set up a target at 100 yds made of paper, with another target set up at 200 or 300 yds that the bullet will pass through you will get your answer. If it is shooting in the 2's at 100 you will find the groups on the longer target to be in the 2's as well.</p><p></p><p>Another good method to test them is set up a target at longer range, say 400-600 yds, that you will use as an aim point and then set up the 100 yd target in bullet's path so you can compare these targets as well. If your groups open up when shooting at the longer range, they will open up on the 100 yd target as well.</p><p></p><p>I would look at the raw data on my strings as well. List them out then sort them by string/velocity. A spreadsheet is handy for this. Are the velocities equally distributed, or do you have a clump with a smaller ES with 1 or 2 outliers? What is your Standard Deviation? It is a much better indicator as to what is going on. (By the way, 6 X SD will give you the true ES to be expected over the life of your barrel with this load.)</p><p></p><p>If the chronograph data is correct, you must be on a good, wide node. That is a good thing as minor inconsistencies in your loads won't show up on the target, which is what you are seeing now.</p><p></p><p>FWIW</p></blockquote><p></p>
[QUOTE="dsculley, post: 1224553, member: 77514"] So you have a quandary, do I believe my chronograph or my target? Personally, if I were shooting .1 " to .2" 10 shot groups consistently I would not care what my chronograph said. Sounds like it is time to stretch its legs and see how it performs at distance. If it shoots that well at 100 yds, it should shoot well at distance. Just for fun, if you can set up a target at 100 yds made of paper, with another target set up at 200 or 300 yds that the bullet will pass through you will get your answer. If it is shooting in the 2's at 100 you will find the groups on the longer target to be in the 2's as well. Another good method to test them is set up a target at longer range, say 400-600 yds, that you will use as an aim point and then set up the 100 yd target in bullet's path so you can compare these targets as well. If your groups open up when shooting at the longer range, they will open up on the 100 yd target as well. I would look at the raw data on my strings as well. List them out then sort them by string/velocity. A spreadsheet is handy for this. Are the velocities equally distributed, or do you have a clump with a smaller ES with 1 or 2 outliers? What is your Standard Deviation? It is a much better indicator as to what is going on. (By the way, 6 X SD will give you the true ES to be expected over the life of your barrel with this load.) If the chronograph data is correct, you must be on a good, wide node. That is a good thing as minor inconsistencies in your loads won't show up on the target, which is what you are seeing now. FWIW [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Trying to lower ES in .260 AI
Top