How to calculate bullet drop and "clicks" of adjustments

heiko

heiko

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Just trying to get something straight here with regards to ballistics and scope adjustments.

Lets say for example that the gun is a 22-250 zeroed for 100 yards. It will be about 24" low at 400 yards with factory 55 grain ammo (according to Remington Shoot). 1 MOA is = 4 inches at 400yards?? This means that a scope with 1/4 MOA adjustments I would need to "click" up 6 MOA or 24 clicks to be on at 400yards????

Is this correct or would I have to "click" up 24 inches.....basically 96 clicks!


thanks guys
 
Thanks for the info guys. I realize that many other factors would have an effect on the actual rise/fall numbers but what I was mainly trying to get straight in my head was that:
1 MOA at 400 yards is 4"
and that if a bullet drops 24" at 400 yards, I would have to adjust 6 MOA or 24 clicks to be on at 400yards

I believe Steve answered this, thanks!

Thanks for the link Jamie and Juster, I'm going to give it a try but much of the info needed to fill in the blanks, I do not know for the factory ammo.
 
My method is to find out how much bullet drop there is for YOUR rifle and AMMO. If your 22-250 drops....oh lets say 43.7 inches at 525 yards. you take the 43.7 inches of drop an devide it by 5.25 ( a decimal equivelent to 525 yards) to get 8.32 MOA. If you base your zero on 100 yards and calculate all your ballistics by this, your come ups become relatively easy to calculate.
It works for any distance. as long as you know how much the bullet drops by.

I am shooting a red balloon that I ranged at 636 yards. I know my 6mm BR drops 92 inches at that distance if I am zeroed at 100 yards with my VMax load. 92 inches devided by 6.36 = 14.4 MOA. I would then take the number 14.4 and multiply by 4 to get my scopes click value.... 57.6 clicks or just round it to 58.I turn the top turret of my scope almost one full revolution (15 being one complete turn) and I should be damn close if not exactly on target.



A good ballistics calculator will spit out a good flight path of the bullet you choose to shoot. Just make sure you can enter a Ballistic Coefficiant. Every bullet is different. To get even more precise you enter drag functions, but it dosn't have to be that complicated.

Hope this helps
 
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