I have a Weatherby Vanguard S1 270 WSM and I'm making it my long range gun. I have added a new stock, bedded the entire action, and the barrel is free floated. I have a vortex HSLR 4-16x44. I am looking for a gun to hunt with out to 1000 yards or less and just for fun out further.
Iv loaded my own ammo with norma brass, Barnes LRX bullet's 129 Gr. using WLRM primers, With H4831powder. I have it zeroed at 200 yards. I shot a group of .531 inches with the load at100 yards
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37454&stc=1&d=1407717283
I am using the G7 ballistic calculator on the vortex website.
I have chronograph the the load and with the load I it stated the average velocity was 3110 FPS with a 12 FPS spread. I went to the range and shot a 400 yard and 600 yard 5 shot group. I used the true muzzle velocity formula on the G7 and I was low at both 400 and 600 yards. I averaged the two groups with there height and it came out with 3006 FPS. The heat rays were really bad in the scope I don't know if that had anything to do with it.
I returned that night no rays and shot the same at 400 and 600 yards and was an average of 5 inches high at 400 and 5.8 at 600. I shot at 850 yards and all bullets flew over the target. I returned and calculated the data on the trajectory validation and it showed I was pushing 3262 FPS. That was well over the choreographed data I got.
I went to the range again today and created my new drop chart for the 3262 FPS and verified the 200 yard zero. I went to the 400 yard shot, The chart stated 3.5 MOA of adjustment. I dialed it in and shot the five shot group and great group. I did the same at 600 yards and it stated 8.1 MOA of adjustment. My scope is in 1/2 in MOAs so I Dialed 8 MOA. Again great group. Here is a picture of the group.
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37455&stc=1&d=1407717403
I got it backwards the green dots are 400 and red dots are 600.
I went back to 855 yards and and the drop chart showed 15.1 MOA. I dialed the scope to 15 MOA and shot six shells. After the first three I thought I had a wind drift so I calculated it out and .5 MOA and shot three more. Here is the target at 855 Yards
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37456&stc=1&d=1407717403
The shots from 850 yards are way low. One shot was off paper due to the adjustment I made for the crosswind that was not there. The other five are at an average of 12.2 inches low (three below the bullseye are the first three). I used the trajectory validation when I got home from the range and it showed that 3161 FPS was the true velocity. I figured the 400 yard group to be -1 inch low at the four hundred and the trajectory validation was 3186.
Those numbers are not to far off my original velocity with the chronograph. not sure what else to do I'v burnt through a lot of ammo and just want to get it right.
Should I do my furthest yard that I want to shoot and do the trajectory validation off of it first, or whats the best way?
Whats the best way to figure out the avenge drop on the target when you have some holes above and below bullseye. I just based it off the ones below since there was more. Is there a way to figure in both?
Any help would be great. Thanks
Iv loaded my own ammo with norma brass, Barnes LRX bullet's 129 Gr. using WLRM primers, With H4831powder. I have it zeroed at 200 yards. I shot a group of .531 inches with the load at100 yards
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37454&stc=1&d=1407717283
I am using the G7 ballistic calculator on the vortex website.
I have chronograph the the load and with the load I it stated the average velocity was 3110 FPS with a 12 FPS spread. I went to the range and shot a 400 yard and 600 yard 5 shot group. I used the true muzzle velocity formula on the G7 and I was low at both 400 and 600 yards. I averaged the two groups with there height and it came out with 3006 FPS. The heat rays were really bad in the scope I don't know if that had anything to do with it.
I returned that night no rays and shot the same at 400 and 600 yards and was an average of 5 inches high at 400 and 5.8 at 600. I shot at 850 yards and all bullets flew over the target. I returned and calculated the data on the trajectory validation and it showed I was pushing 3262 FPS. That was well over the choreographed data I got.
I went to the range again today and created my new drop chart for the 3262 FPS and verified the 200 yard zero. I went to the 400 yard shot, The chart stated 3.5 MOA of adjustment. I dialed it in and shot the five shot group and great group. I did the same at 600 yards and it stated 8.1 MOA of adjustment. My scope is in 1/2 in MOAs so I Dialed 8 MOA. Again great group. Here is a picture of the group.
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37455&stc=1&d=1407717403
I got it backwards the green dots are 400 and red dots are 600.
I went back to 855 yards and and the drop chart showed 15.1 MOA. I dialed the scope to 15 MOA and shot six shells. After the first three I thought I had a wind drift so I calculated it out and .5 MOA and shot three more. Here is the target at 855 Yards
http://www.longrangehunting.com/forums/attachment.php?attachmentid=37456&stc=1&d=1407717403
The shots from 850 yards are way low. One shot was off paper due to the adjustment I made for the crosswind that was not there. The other five are at an average of 12.2 inches low (three below the bullseye are the first three). I used the trajectory validation when I got home from the range and it showed that 3161 FPS was the true velocity. I figured the 400 yard group to be -1 inch low at the four hundred and the trajectory validation was 3186.
Those numbers are not to far off my original velocity with the chronograph. not sure what else to do I'v burnt through a lot of ammo and just want to get it right.
Should I do my furthest yard that I want to shoot and do the trajectory validation off of it first, or whats the best way?
Whats the best way to figure out the avenge drop on the target when you have some holes above and below bullseye. I just based it off the ones below since there was more. Is there a way to figure in both?
Any help would be great. Thanks
