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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Zeiss Conquest 6.5 x 20 x 50 on Remington 700
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<blockquote data-quote="bruce_ventura" data-source="post: 999175" data-attributes="member: 34084"><p>I can think of only four reasons for the zero to be off 12 MOA from boresight. </p><p></p><p>1. Bullet drop - accounts for about 3 MOA of the 12 MOA at 100 yds. </p><p></p><p>2. Barrel vibration. It's possible, but not common to see vibration throw shots away from boresight by more than 8-10 MOA. I've seen >10 MOA on big magnums like 300 H&H, but not on a .308.</p><p></p><p>3. Boresight collimator calibration is off. Again, possible but not likely that calibration is off more than 6 MOA. </p><p></p><p>4 Operator error using the collimator / poor spud fit in the bore. Late model Tasco spuds are undersized. This could account for up to 4-6 MOA of offset. </p><p></p><p>Seems like a combination of factors are at play here.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 999175, member: 34084"] I can think of only four reasons for the zero to be off 12 MOA from boresight. 1. Bullet drop - accounts for about 3 MOA of the 12 MOA at 100 yds. 2. Barrel vibration. It's possible, but not common to see vibration throw shots away from boresight by more than 8-10 MOA. I've seen >10 MOA on big magnums like 300 H&H, but not on a .308. 3. Boresight collimator calibration is off. Again, possible but not likely that calibration is off more than 6 MOA. 4 Operator error using the collimator / poor spud fit in the bore. Late model Tasco spuds are undersized. This could account for up to 4-6 MOA of offset. Seems like a combination of factors are at play here. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Zeiss Conquest 6.5 x 20 x 50 on Remington 700
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