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<blockquote data-quote="Greyfox" data-source="post: 742619" data-attributes="member: 10291"><p>Being a 6.5x284 shooter, it is very unlikely that 6.5 MOA is the actual drop for 500 yards with a 100 yard zero. Your velocity of 3250FPS is not right. Shooting a golf ball sized rock for establishing your 100 yard zero is not precise enough for accurately determining drop data out at 500 yards. This is very likely the compounded variation you are experiencing at 500 yards. Having used numerous lots of 140 VLD's it also not likely that the BC of your bullet is that far off the published spec. I don't trust chrongraphs that much but your chronographed velocity of 2930 sounds realistic and even a variation of 50 FPS wouldn't give you the drop variation you are experiencing at 500 yards. I determine the drop data for my 6.5 x284 using a 200 yard zero that has to be nuts on with at least a 1" perfectly centered group. At 100 yards, .5 MOA. The ballistic data/drops, assuming all other variables are entered correctly, using the Bergers are always very close to expectation. IMHO.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 742619, member: 10291"] Being a 6.5x284 shooter, it is very unlikely that 6.5 MOA is the actual drop for 500 yards with a 100 yard zero. Your velocity of 3250FPS is not right. Shooting a golf ball sized rock for establishing your 100 yard zero is not precise enough for accurately determining drop data out at 500 yards. This is very likely the compounded variation you are experiencing at 500 yards. Having used numerous lots of 140 VLD's it also not likely that the BC of your bullet is that far off the published spec. I don't trust chrongraphs that much but your chronographed velocity of 2930 sounds realistic and even a variation of 50 FPS wouldn't give you the drop variation you are experiencing at 500 yards. I determine the drop data for my 6.5 x284 using a 200 yard zero that has to be nuts on with at least a 1" perfectly centered group. At 100 yards, .5 MOA. The ballistic data/drops, assuming all other variables are entered correctly, using the Bergers are always very close to expectation. IMHO. [/QUOTE]
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