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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Swarovski vs. Zeiss, HELP
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<blockquote data-quote="bruce_ventura" data-source="post: 870657" data-attributes="member: 34084"><p>Over what range of altitudes do you plan to hunt? </p><p></p><p>Be aware that the Z5 BT turret only has 10.5 IPHY of range (nearly one revolution). You probably know that, but the other readers may not. You might get out to 650 yds at high elevation (>8,000 ft) with a 200 yd zero. At lower elevations, 550 yds is more likely. </p><p></p><p>Frankly, I would pass on the custom turret and just use the stock BT over that range. The custom turrets are more useful for the Z6 scopes that have a larger BT adjustment range. </p><p></p><p>Getting back to your question, I ran a few calculations for your caliber. The POI only changes 5 inches at 600 yds range for a 4,000 ft altitude difference, combined with a 32 F temp difference. Split the difference between your high and low conditions and you should be OK.</p><p></p><p>An error in muzzle velocity and ballistic coefficient can cause a bigger POI shift than the error due to altitude/temp. If it were me, I would measure bullet drop at 500-600 yds for that ammo in my gun before ordering a custom turret. I would order the turret scale in yds and IPHY to match the turret clicks. If you can only get one or the other, definitely get it in yds (or meters). Getting a custom BDC turret in anything else defeats the purpose of a BDC turret.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 870657, member: 34084"] Over what range of altitudes do you plan to hunt? Be aware that the Z5 BT turret only has 10.5 IPHY of range (nearly one revolution). You probably know that, but the other readers may not. You might get out to 650 yds at high elevation (>8,000 ft) with a 200 yd zero. At lower elevations, 550 yds is more likely. Frankly, I would pass on the custom turret and just use the stock BT over that range. The custom turrets are more useful for the Z6 scopes that have a larger BT adjustment range. Getting back to your question, I ran a few calculations for your caliber. The POI only changes 5 inches at 600 yds range for a 4,000 ft altitude difference, combined with a 32 F temp difference. Split the difference between your high and low conditions and you should be OK. An error in muzzle velocity and ballistic coefficient can cause a bigger POI shift than the error due to altitude/temp. If it were me, I would measure bullet drop at 500-600 yds for that ammo in my gun before ordering a custom turret. I would order the turret scale in yds and IPHY to match the turret clicks. If you can only get one or the other, definitely get it in yds (or meters). Getting a custom BDC turret in anything else defeats the purpose of a BDC turret. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Swarovski vs. Zeiss, HELP
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