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Need help with leupold CDS dials for .300 win mag

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/26/2012 at 00:59
dirtrider View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: February/26/2012
Status: Offline
Points: 3
I am pretty new to rifles but have numerous handguns.  I picked up a new winchester model 70 in .300 win mag.  I also picked up a new leupold CDS VX-3 4.5-14 x 40.  So I need help deciding on the dials to get for this.

I will need to get accustomed to this rifle by shooting quite a bit at a range first.  After I gather some experience I would like to hunt with it someday.  Not sure what yet or where. 

I have quite a bit of the following factory ammo already (100-200 rounds of each):
Nosler Custom Trophy Grade Accubond 180gr
    19.3" drop, 2261 fps, 2043 ft-lb @400yards with 200yd zero
    2950fps and 3478 ft-lb at the muzzle
Winchester Power-Point 180gr
    20.3" drop, 2157 fps, 1859 ft-lb @400yards with 200yd zero
    2960fps and 3501 ft-lb at the muzzle
Federal Premium Vital Shok 130gr Barnes Tipped Triple Shock Hyper Velocity 3500fps
    7.9" drop, 2670fps, 2055 ft-lb, @300yards with 100yd zero
    3500fps and 3535 ft-lb at the muzzle

I think the Nosler and the winchester are hopefully close enough that I can use the same dials for each???  I figured I could use the winchester ammo for practice and then keep most of the nosler ammo for hunting.  If you were wondering I bought the nosler ammo last year when they had the buy 2 get 1 free sale so I figured it was worthwhile to get as it likely won't be cheaper when I need it.  Also got a good deal on the federal and figured it is fine for practice too (maybe hunting) with a different dial.

So I originally ordered my 2 free dials from leupold (on promo) with the following info:
   [Factory load data from above for the nosler and federal ammo]
   Temp:  70 degrees
   Altitude:  1000'
   Zero at 200 yards
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/26/2012 at 01:56
rustic View Drop Down
Optics Master
Optics Master
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Joined: September/30/2011
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Points: 1461
[QUOTE=dirtrider]I am pretty new to rifles but have numerous handguns.  I picked up a new winchester model 70 in .300 win mag.  I also picked up a new leupold CDS VX-3 4.5-14 x 40.  So I need help deciding on the dials to get for this.

I will need to get accustomed to this rifle by shooting quite a bit at a range first.  After I gather some experience I would like to hunt with it someday.  Not sure what yet or where. 

I have quite a bit of the following factory ammo already (100-200 rounds of each):
Nosler Custom Trophy Grade Accubond 180gr
    19.3" drop, 2261 fps, 2043 ft-lb @400yards with 200yd zero
    2950fps and 3478 ft-lb at the muzzle
Winchester Power-Point 180gr
    20.3" drop, 2157 fps, 1859 ft-lb @400yards with 200yd zero
    2960fps and 3501 ft-lb at the muzzle
Federal Premium Vital Shok 130gr Barnes Tipped Triple Shock Hyper Velocity 3500fps
    7.9" drop, 2670fps, 2055 ft-lb, @300yards with 100yd zero
    3500fps and 3535 ft-lb at the muzzle

I think the Nosler and the winchester are hopefully close enough that I can use the same dials for each???  I figured I could use the winchester ammo for practice and then keep most of the nosler ammo for hunting.  If you were wondering I bought the nosler ammo last year when they had the buy 2 get 1 free sale so I figured it was worthwhile to get as it likely won't be cheaper when I need it.  Also got a good deal on the federal and figured it is fine for practice too (maybe hunting) with a different dial.

So I originally ordered my 2 free dials from leupold (on promo) with the following info:
   [Factory load data from above for the nosler and federal ammo]
   Temp:  70 degrees
   Altitude:  1000'
   Zero at 200 yards
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/26/2012 at 09:03
JGRaider View Drop Down
Optics Master
Optics Master


Joined: February/06/2008
Status: Offline
Points: 1432
I like rustic's recs.  Go with an avg elevation.  I personally use a 200 yd sight-in.  I live in the desert so I went with an avg temp of 55*.   You ought to go to jbm ballistics website and play around with the trajectory calculator.  You'll find that variances in elev, temp, etc don't make as much of a difference as you think.  I"d also recommend you chrono your loads and take an avg velocity, then give Leupold that velocity for your dial.  
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/16/2012 at 15:09
dirtrider View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: February/26/2012
Status: Offline
Points: 3
Great point to chrono the velocity first.  I also was able to verify what you mentioned with the jbm calculator.  Good to know I will be able to use the dials hunting even with considerable variance in some of those variables.
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