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# .338 rum question

#1
09-23-2008, 10:28 PM
 Bronze Member Join Date: May 2005 Posts: 56
.338 rum question

I chronographed my .338 rum. IT is shooting 2850fps using a 250 grain soft point bullet. If I zero my rifle at 100 yards. How do I calculate drops at 200 - 500 yards. I have a Mark IV scope which as milldot reticle along with target turrets. How do I calculate how many clicks I will have to adjust my turret if say I try to take a 300 yard shot?
#2
09-23-2008, 10:32 PM
 Bronze Member Join Date: May 2005 Posts: 56
Re: .338 rum question

I read some drop charts online that say this bullet should be 9 inches low at 300 so using my first mildot with is approx 3 inches at 100 would put me close to dead on at 300(using 3(") x 3 (1ooyards)). I'd rather not have to aim using the mil dots but make corrections using the target turrets. Each click is 1/4" adjustments at 100 yards.
#3
09-24-2008, 12:58 AM
 Silver Member Join Date: May 2008 Location: NEW ZEALAND Posts: 208
Re: .338 rum question

Hi There,

9" @ 300 yrds will be 3 MOA or 12 clicks from a 100 yrd Zero.

#4
09-24-2008, 09:46 AM
 Bronze Member Join Date: May 2005 Posts: 56
Re: .338 rum question

what about 22 inch drop at 400 yards and 45 inch drop at 500 yards? How many clicks would I need then?
#5
09-24-2008, 10:11 AM
 Platinum Member Join Date: Jan 2003 Location: The rifle range, or archery range or behind the computer in Alaska Posts: 3,154
Re: .338 rum question

(Inches of drop)/(Click value*yards/100)

22 divided by 1.00 = 22 clicks.

45 divided by 1.25 = 36 clicks.
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#6
09-24-2008, 04:49 PM
 Platinum Member Join Date: May 2008 Location: South of Canada and North of Wyoming Posts: 4,150
Re: .338 rum question

Here's an online ballistics calculator, you can figure out most of this stuff on your own. A cool little toy.

External Ballistics Calculator
#7
09-24-2008, 11:26 PM
 Silver Member Join Date: Aug 2008 Location: Forks, Wa Posts: 122
Re: .338 rum question

Quote:
 Originally Posted by MontanaRifleman Here's an online ballistics calculator, you can figure out most of this stuff on your own. A cool little toy. External Ballistics Calculator
Is this very accurate.. i asked this same question about a 338 RUM at higher altitude.. if so thankyou

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