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Competition, Tactics & Training
Shooting Chat
Vortex Razor HD scope not tracking true
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<blockquote data-quote="Jcann" data-source="post: 3161671" data-attributes="member: 33119"><p>I've run this same load since day one with this rifle. It has slowed down from about 2984 to around 2930 fps with 65.8 grains of H1000. Looking at my archived series from my magnetospeed my min was 2914 and max was 2930 (this was a 10 shot series). These were shot the same day we shot steel at 910 yards.</p><p></p><p>Back tracking on my app, I would need to have a muzzle velocity of 3050 fps to have 5.5 mils at 910 yards so I can either change my velocity in the app or I can change the sight correction factor from 1 to 0.9. Either way I get the same data as seen in the field of 1.8 mils at 455 yards and 5.5 mils at 910 yards. Now I know I'm not getting 3050 fps out of my 7wsm. I can't get enough powder in the case to do that without blowing something up and its certainly not the BC.</p><p></p><p>I'll get back out in a week or two and run a tall target/box test on the scope. If the scope is tracking true I'll run some more field data with the sight correction factor in the app and see how everything works.</p><p></p><p>BTW, I have used two different chronographs, a shooting chrony and a magnetospeed and both showed roughly the same.</p></blockquote><p></p>
[QUOTE="Jcann, post: 3161671, member: 33119"] I've run this same load since day one with this rifle. It has slowed down from about 2984 to around 2930 fps with 65.8 grains of H1000. Looking at my archived series from my magnetospeed my min was 2914 and max was 2930 (this was a 10 shot series). These were shot the same day we shot steel at 910 yards. Back tracking on my app, I would need to have a muzzle velocity of 3050 fps to have 5.5 mils at 910 yards so I can either change my velocity in the app or I can change the sight correction factor from 1 to 0.9. Either way I get the same data as seen in the field of 1.8 mils at 455 yards and 5.5 mils at 910 yards. Now I know I'm not getting 3050 fps out of my 7wsm. I can't get enough powder in the case to do that without blowing something up and its certainly not the BC. I'll get back out in a week or two and run a tall target/box test on the scope. If the scope is tracking true I'll run some more field data with the sight correction factor in the app and see how everything works. BTW, I have used two different chronographs, a shooting chrony and a magnetospeed and both showed roughly the same. [/QUOTE]
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