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Scope Turrents

 
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  #1  
Old 03-02-2012, 03:58 PM
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Join Date: Mar 2012
Posts: 1
Scope Turrents

I use a Savage, bolt action, 7mag with a Nikon BDC scope and a Basix trigger for my "long shots", above 300 yards. My cartrige of choice is the Remington Premier Accu Tip ABT 140gr. I was watching the Outdoor Channel the other day and a "hunter" on the show had some "turrents" on his scope that adjusted to the range he wanted to shoot. He adjusted the turrent to the range and sighted in "dead center. To say the least, I was intreged. Can anybody offer any advise or suggestions pertaing to these scope turrents? Thanks
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  #2  
Old 03-02-2012, 04:36 PM
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Join Date: Jan 2010
Location: utah
Posts: 366
Re: Scope Turrents

I would suggest learning about external ballistics, minutes and mils before going to bdc type reticles and turrets there are to many factors for the advertised one size fits all

click this link Nikon is now offering Ballistic Match Technology Turrets
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  #3  
Old 03-02-2012, 04:52 PM
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Join Date: Feb 2012
Location: Iron Range, Minnesota
Posts: 789
Re: Scope Turrents

If I'm reading this right, you are asking about what the turrets on a scope are?

The turrets are your windage and elevation adjustment knobs. The hunter had his rifle sighted in at a certain distance and had a drip chart for his rifle/scope/round set up, and was then able to adjust his scope for the drop at that distance, from his zero, so he wouldn't have any hold over.

If you were talking about the ballistic match turrets that Nikon makes, they manufacture turrets to match the ballistics of a particular round
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  #4  
Old 03-02-2012, 09:20 PM
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Location: utah
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Re: Scope Turrents

Quote:
Originally Posted by emn83 View Post
If I'm reading this right, you are asking about what the turrets on a scope are?

The turrets are your windage and elevation adjustment knobs. The hunter had his rifle sighted in at a certain distance and had a drip chart for his rifle/scope/round set up, and was then able to adjust his scope for the drop at that distance, from his zero, so he wouldn't have any hold over.

If you were talking about the ballistic match turrets that Nikon makes, they manufacture turrets to match the ballistics of a particular round
here in is the problem there is no one size fits all for a "round" bullet type, atmospherics, altitude, exc changes everything. couple this with many shooters lack of knowledge on the subject is a recipe for disaster! most people buying these (and selling) these "drop compensators have no clue whats happening

Last edited by load; 03-02-2012 at 10:36 PM.
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  #5  
Old 03-02-2012, 09:49 PM
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Join Date: Jan 2012
Location: Hot Springs, South Dakota
Posts: 505
Re: Scope Turrents

If you don't do all the work to create a ballistic profile they are a waste. However, if you gain the knowledge need and do all the work, they will work well for that particular profile.

To give an example:

At 3300 ft elevation and 60 degress you might have a drop of 40.6" at 500 yds
At 6000 ft and 38 degrees, all other factors the same, drop of 37.4" at 500 yds

Not a huge difference, but could be enough to make you miss.

Add wind drift (10mph):

3300 and 60: 21.1"
6000ft and 38: 16.8"

Still not a huge difference, but once again it could be enough to create a miss.

Take that out beyond 500 yds and you are definitely going to miss.

at 800 yds:

3300 and 60: 168.7" drop and 62.7" of movement
6000 and 38: 146.2" drop and 48.4" of movement

The only way to get a multitude of hunting environments covered it to have multiple turrents. The closer the turrent matches your shooting environment the closer they will work.

Basically, you need to purchase multiple turrents to cover multiple hunting environments.
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  #6  
Old 03-02-2012, 10:00 PM
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Join Date: Dec 2001
Location: Potters Hill, NC
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Re: Scope Turrents

Troy,
Welcome to LRH. Sounds to me like the TV show you were watching may have been "Best of the West". If that was the show, it's good and I enjoy watching it when I can. They make taking game at long range look easy, and it is if you have the right equipment. I believe that was the purpose of your post.
The scope they use are Huskemaw's. The ballistics of the particular bullet you're shooting are input into a computer program and this determines the correct yardage marks for the scope's turrets. They're either etched into the turret by a computer guided machine or could be made from some type of stickers that the marks are printed on.
You certainly have the rifle/cartridge capable of making those long range hits and most well built, reputable named scopes can do the same thing as the Huskemaw's. In order to make a drop chart and perform these shots with a scope with target style turrets (no coin slots) you will have to know your bullets actual velocity. You will get more accurate data from a chronograph than from the back of a box of factory ammo (I'm assuming you're using factory fodder). This info, along with the bullet's ballistic coefficient, scope height, zero yardage and atmospheric data (i.e. wind, elevation barometric pressure, humidity and temperature) are fed into a ballistic program on a computer. This produdes a drop chart for your bullet's trajectory and will be good until one of the above mentioned factors changes. Ballistic programs are easily accessible on the web (check out JBM).
Sounds like you got a itch that needs scratching. Read on brother, it just itches more! Again, welcome to Long Range Hunting. JohnnyK.
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  #7  
Old 03-02-2012, 10:20 PM
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Join Date: Jan 2012
Location: Hot Springs, South Dakota
Posts: 505
Re: Scope Turrents

Quote:
Originally Posted by johnnyk View Post
Troy,
Welcome to LRH. Sounds to me like the TV show you were watching may have been "Best of the West". If that was the show, it's good and I enjoy watching it when I can. They make taking game at long range look easy, and it is if you have the right equipment. I believe that was the purpose of your post.
The scope they use are Huskemaw's. The ballistics of the particular bullet you're shooting are input into a computer program and this determines the correct yardage marks for the scope's turrets. They're either etched into the turret by a computer guided machine or could be made from some type of stickers that the marks are printed on.
You certainly have the rifle/cartridge capable of making those long range hits and most well built, reputable named scopes can do the same thing as the Huskemaw's. In order to make a drop chart and perform these shots with a scope with target style turrets (no coin slots) you will have to know your bullets actual velocity. You will get more accurate data from a chronograph than from the back of a box of factory ammo (I'm assuming you're using factory fodder). This info, along with the bullet's ballistic coefficient, scope height, zero yardage and atmospheric data (i.e. wind, elevation barometric pressure, humidity and temperature) are fed into a ballistic program on a computer. This produdes a drop chart for your bullet's trajectory and will be good until one of the above mentioned factors changes. Ballistic programs are easily accessible on the web (check out JBM).
Sounds like you got a itch that needs scratching. Read on brother, it just itches more! Again, welcome to Long Range Hunting. JohnnyK.
Even though you get the drop chart, you will still need to do a verification step. In other words, make sure your drop chart is correct and accurate. Vortex recommends you verify to atleast 70% of the distance that you hope to get your turrent. So, not a simple fix.
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