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
What would cause this? Bullet drop with elevation change
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="Capt RB" data-source="post: 2048767" data-attributes="member: 85987"><p>It's not. Take a look at density altitude. I shoot alot in winter at 34' above sea level. My typical DA is -3500' at 20 degrees. Using 60 degrees with a dew point at 58 the DA would increase from 800 to 12XX'. Using 7200 20 and 0 for dew point you are more than double signifying much better ballistics downrange. They lost 2 minutes on there 0 which would be the 6" at 300 yds if they didn't add that 2 minutes back before correcting to their 300yd dope. I had a 2.5 moa zero change when I went from Ft Lewis to Germany. I had a 1moa change from the post in Germany to the winter training area in Hornsfel Germany. I had a 1moa change when I went to the desert. The dope changes some based on DA and the zero changes in some cases. Today I would say that the differences in Lattitude have far more to do with changes in zero with the information available that pertains to the angle of the sun. IE the light is being bent slightly different making your optical system project your reticle in a different place than where you zeroed the rifle. You can log this at your range by shooting morning noon or night. Another eye-opener is when it is bright and a cloud blocks the sun watch what happens to the bullet on the same hold.</p></blockquote><p></p>
[QUOTE="Capt RB, post: 2048767, member: 85987"] It's not. Take a look at density altitude. I shoot alot in winter at 34' above sea level. My typical DA is -3500' at 20 degrees. Using 60 degrees with a dew point at 58 the DA would increase from 800 to 12XX'. Using 7200 20 and 0 for dew point you are more than double signifying much better ballistics downrange. They lost 2 minutes on there 0 which would be the 6" at 300 yds if they didn't add that 2 minutes back before correcting to their 300yd dope. I had a 2.5 moa zero change when I went from Ft Lewis to Germany. I had a 1moa change from the post in Germany to the winter training area in Hornsfel Germany. I had a 1moa change when I went to the desert. The dope changes some based on DA and the zero changes in some cases. Today I would say that the differences in Lattitude have far more to do with changes in zero with the information available that pertains to the angle of the sun. IE the light is being bent slightly different making your optical system project your reticle in a different place than where you zeroed the rifle. You can log this at your range by shooting morning noon or night. Another eye-opener is when it is bright and a cloud blocks the sun watch what happens to the bullet on the same hold. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
What would cause this? Bullet drop with elevation change
Top