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
My Longest Ladder ever!......7mm Mag & 180 VLD's
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="Longtine88" data-source="post: 2132521" data-attributes="member: 116240"><p>Ok, so back to this ladder I've been working on after a week of arctic weather and a few days of rain. I got a break in the weather. 50 degrees no wind or rain. So I am the help of the above decided to go with the 70.1 to 70.7 powder charge range. This is what I did:</p><p></p><p>1. Loaded 5 at 70.5 as sighters and fowlers.</p><p>2. Loaded 5 of each 70.1, 70.3, 70.5, 70.7.</p><p>3. Same OAL's as the original ladder firings.</p><p></p><p>My target was set at 655 yards from the bench. Used 3 fowlers. One to get on target, then 2 at 200 yards to get it dialed in. Then dialed in 11.0 MOA of elevation to shoot.</p><p></p><p>I used a cold bore type approach since this is a hunting rifle.</p><p></p><p>I shot one of each group at 4 separate 1.5" targets spaced out around the target which was a piece of sheet metal I had laying around. </p><p></p><p>1. I shot the first of 70.1 and went through all 4 loads at each of their designated targets letting the barrel cool for 4 mins in between. </p><p>2. After the barrel cooled after 20 mins of the first rounds I began the 2nd round and then on to the third round.</p><p></p><p>After all the shots had been fired I took measurements from center of impacts of each charge weight. </p><p></p><p>70.1: 1st Left .52" Up .1", 2nd Right .75" Up .22", 3rd Right .2" Up .42". Overall 3 shots 1.24"</p><p>70.3: 1st Right 1.05" Up .5", 2nd Left .54" Up .75", 3rd Left .7" Up .32". Overall 3 shots 1.75"</p><p>70.5: 1st Right .5" Up 1.3", 2nd Right 2.8" Up 1.8", 3rd Right 2.2" Up 2.5" Overall 3 shots 2.3"</p><p>70.7: 1st Right 1.0" Up 2.4", 2nd Right 3.1" Up 3.5", 3rd Right 3.8" Up 2.0" Overall 3 shots 2.8"</p><p></p><p>Strings 70.1 and 70.3 both had almost identical point of impacts from center and seemed like a stable range between 70.1 and 70.3 because of the very little vertical dispersion and same center of impact point. The 70.5 and 70.7 starting drift up and right from aiming point but still holding a good group. So I still had 2 rounds of each charge weights left and decided to shoot the 70.1 Grains again but this time shoot them one after the other. First shot fell right in the middle of the first 3 shot group. The second went Right .95" Up .6". So this proves my vertical dispersion is really good. It widened the group to 1.46"</p><p></p><p>At this point I'm thinking of playing around the 70.1 grains and play with seating depths for improved accuracy but then I was like dude this is 1.46" at 650 yards and it's a freaking hunting rifle. The only thing I got to thinking about was maybe dropping down another .2 grains from 70.1 and loading a round of 69.9's and seeing if they held the same point of impact. Thoughts and comments please</p></blockquote><p></p>
[QUOTE="Longtine88, post: 2132521, member: 116240"] Ok, so back to this ladder I've been working on after a week of arctic weather and a few days of rain. I got a break in the weather. 50 degrees no wind or rain. So I am the help of the above decided to go with the 70.1 to 70.7 powder charge range. This is what I did: 1. Loaded 5 at 70.5 as sighters and fowlers. 2. Loaded 5 of each 70.1, 70.3, 70.5, 70.7. 3. Same OAL's as the original ladder firings. My target was set at 655 yards from the bench. Used 3 fowlers. One to get on target, then 2 at 200 yards to get it dialed in. Then dialed in 11.0 MOA of elevation to shoot. I used a cold bore type approach since this is a hunting rifle. I shot one of each group at 4 separate 1.5" targets spaced out around the target which was a piece of sheet metal I had laying around. 1. I shot the first of 70.1 and went through all 4 loads at each of their designated targets letting the barrel cool for 4 mins in between. 2. After the barrel cooled after 20 mins of the first rounds I began the 2nd round and then on to the third round. After all the shots had been fired I took measurements from center of impacts of each charge weight. 70.1: 1st Left .52" Up .1", 2nd Right .75" Up .22", 3rd Right .2" Up .42". Overall 3 shots 1.24" 70.3: 1st Right 1.05" Up .5", 2nd Left .54" Up .75", 3rd Left .7" Up .32". Overall 3 shots 1.75" 70.5: 1st Right .5" Up 1.3", 2nd Right 2.8" Up 1.8", 3rd Right 2.2" Up 2.5" Overall 3 shots 2.3" 70.7: 1st Right 1.0" Up 2.4", 2nd Right 3.1" Up 3.5", 3rd Right 3.8" Up 2.0" Overall 3 shots 2.8" Strings 70.1 and 70.3 both had almost identical point of impacts from center and seemed like a stable range between 70.1 and 70.3 because of the very little vertical dispersion and same center of impact point. The 70.5 and 70.7 starting drift up and right from aiming point but still holding a good group. So I still had 2 rounds of each charge weights left and decided to shoot the 70.1 Grains again but this time shoot them one after the other. First shot fell right in the middle of the first 3 shot group. The second went Right .95" Up .6". So this proves my vertical dispersion is really good. It widened the group to 1.46" At this point I'm thinking of playing around the 70.1 grains and play with seating depths for improved accuracy but then I was like dude this is 1.46" at 650 yards and it's a freaking hunting rifle. The only thing I got to thinking about was maybe dropping down another .2 grains from 70.1 and loading a round of 69.9's and seeing if they held the same point of impact. Thoughts and comments please [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
My Longest Ladder ever!......7mm Mag & 180 VLD's
Top