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
Berger .338 300 grain EH - ballistic coefficient
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="Timber338" data-source="post: 1174221" data-attributes="member: 33822"><p>Was able to get out and shoot again this morning and I figured out where and how I was 4 inches low last week. Turns out the ballistic coefficient was correct AND the muzzle velocity was correct. So thanks again for the feedback that something else was wrong last week ...</p><p></p><p>Overall a great lesson in how close you have to pay attention to every single detail. I started out this morning going over every single variable. Starting at 600 yards, I verified the exact distance to be 608 yards... as the shooting benches are 8 yards behind the berm where you lay down prone. Also verified the angle I was shooting at 348 degrees for Coriolis, which confused me at the time since looking at a map which I did in the past said I was shooting somwhere between 6 and 8 degrees. So I turned on Coriolis and spin drift, used 2705 for MV and shot about 2 inches high...</p><p></p><p>At 1000, it was similar... 1005 yards, 5 yards behind the prone area. I used 2705 MV and 1005 yards, along with 348 degrees for coriolos... and the shots went about 4 inches high...</p><p></p><p>There's 3.1 inches additional drop at 1005, and it also turns out my phone was set for magnetic north, not true north. And just that little difference in angle is about another inch of drop compared to the 6-8 degrees at true north, and then the shooting solution called for 23.4 MOA so I dialed 23.5. It all added up to shoot a touch over 4 inches high.</p><p></p><p>Really hammered the lesson that you have to be spot on with every single variable.</p><p></p><p>I'll spend some more time practicing and hopefully shooting out to 1200 and 1400 and beyond to really get more confident in this load, but as it stands I'm think I'm right where I want to be, splitting hairs at 1000 yards down to the final 1/4 MOA (1-click) that I dial.</p></blockquote><p></p>
[QUOTE="Timber338, post: 1174221, member: 33822"] Was able to get out and shoot again this morning and I figured out where and how I was 4 inches low last week. Turns out the ballistic coefficient was correct AND the muzzle velocity was correct. So thanks again for the feedback that something else was wrong last week ... Overall a great lesson in how close you have to pay attention to every single detail. I started out this morning going over every single variable. Starting at 600 yards, I verified the exact distance to be 608 yards... as the shooting benches are 8 yards behind the berm where you lay down prone. Also verified the angle I was shooting at 348 degrees for Coriolis, which confused me at the time since looking at a map which I did in the past said I was shooting somwhere between 6 and 8 degrees. So I turned on Coriolis and spin drift, used 2705 for MV and shot about 2 inches high... At 1000, it was similar... 1005 yards, 5 yards behind the prone area. I used 2705 MV and 1005 yards, along with 348 degrees for coriolos... and the shots went about 4 inches high... There's 3.1 inches additional drop at 1005, and it also turns out my phone was set for magnetic north, not true north. And just that little difference in angle is about another inch of drop compared to the 6-8 degrees at true north, and then the shooting solution called for 23.4 MOA so I dialed 23.5. It all added up to shoot a touch over 4 inches high. Really hammered the lesson that you have to be spot on with every single variable. I'll spend some more time practicing and hopefully shooting out to 1200 and 1400 and beyond to really get more confident in this load, but as it stands I'm think I'm right where I want to be, splitting hairs at 1000 yards down to the final 1/4 MOA (1-click) that I dial. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Berger .338 300 grain EH - ballistic coefficient
Top