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Rifles, Reloading, Optics, Equipment
Reloading
7STW 180VLD Retumbo
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<blockquote data-quote="jweigel" data-source="post: 1098931" data-attributes="member: 72021"><p>Thanks for the feedback guys. I have made lots of trips to the range with this gun and two others. One thing about this gun is it is consistent. I attached the bullet seating depth test shot at 100 yrds. After testing seating depth three times I verified that .010 OTL is the sweat spot for this gun. I did all my powder testing at that seating depth. I also attached one of the many trips that the groups were pretty representative of other trips but this time out it got to late in the day to get decent chrono readings thus it is not on the table above. Once I narrowed it to 76 and 78 grains, I have shot those two loads three separate times to see which was better. They were both good...one better on one day and one better on the other. I did find this gun likes to be clean after about 30-40 rounds and shots very good clean or with a shot or two to foul.</p><p></p><p>Again....seat depth shot at 100 yards, powder tests shot at 200 yards.</p><p></p><p>I put all the data in access, calculated ES, but not SD. I then calculated an overall average ES for 76.0 grains and 78.0 as well as an overall average MOA.</p><p></p><p>76.0: AV ES=39, AV MOA=.61, AV FPS=2938</p><p>78.0: AV ES=24, AV MOA=.56, AV FPS=3022</p><p></p><p>The MOA was a wash but 78.0 had much better overall lower ES.</p><p></p><p>I just called Leupold and order a turret for the VX6 4x24 scope. Zero at 250. They said it will go to 950 with one revolution. I scope allows for two revolutions but 950 is enough for me.</p><p></p><p>Now if I could only get my 7RM to shot this good....and most importantly....this consistent, trip after trip to the range.</p><p></p><p>jjw</p><p>ND</p></blockquote><p></p>
[QUOTE="jweigel, post: 1098931, member: 72021"] Thanks for the feedback guys. I have made lots of trips to the range with this gun and two others. One thing about this gun is it is consistent. I attached the bullet seating depth test shot at 100 yrds. After testing seating depth three times I verified that .010 OTL is the sweat spot for this gun. I did all my powder testing at that seating depth. I also attached one of the many trips that the groups were pretty representative of other trips but this time out it got to late in the day to get decent chrono readings thus it is not on the table above. Once I narrowed it to 76 and 78 grains, I have shot those two loads three separate times to see which was better. They were both good...one better on one day and one better on the other. I did find this gun likes to be clean after about 30-40 rounds and shots very good clean or with a shot or two to foul. Again....seat depth shot at 100 yards, powder tests shot at 200 yards. I put all the data in access, calculated ES, but not SD. I then calculated an overall average ES for 76.0 grains and 78.0 as well as an overall average MOA. 76.0: AV ES=39, AV MOA=.61, AV FPS=2938 78.0: AV ES=24, AV MOA=.56, AV FPS=3022 The MOA was a wash but 78.0 had much better overall lower ES. I just called Leupold and order a turret for the VX6 4x24 scope. Zero at 250. They said it will go to 950 with one revolution. I scope allows for two revolutions but 950 is enough for me. Now if I could only get my 7RM to shot this good....and most importantly....this consistent, trip after trip to the range. jjw ND [/QUOTE]
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7STW 180VLD Retumbo
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