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Dope inconsistancy

 
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  #1  
Old 01-04-2014, 07:33 PM
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Location: Houston, Texas
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Dope inconsistancy

My rifle and data from shooter match up perfectly, except around 500yds. Ive tested this many times and the results are always similar. At about 450 my bullet starts hitting high, peaks at about .75-1.25moa above data around 500-525yds, then is spot on from 600+.

Ive gotten by with just using a dope chart built around average air density in my area, but id like to understand why this is happening. What am i missing guys?
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  #2  
Old 01-04-2014, 09:42 PM
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Re: Dope inconsistancy

I'd like to know as well. I had a load a few years ago that did the same thing only in reverse. It was low instead of high. Then at 700 it was where it was suppose to be.

This is only one of two things that has ever stumped me in LR shooting. I was using a scope that has always proven to have accurate tracking from 100-1000 yards with every other load and on several rifles.
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Quote:
Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
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  #3  
Old 01-04-2014, 11:37 PM
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Re: Dope inconsistancy

I never put the scope on another rifle but ive put different scopes on this same rifle and the "bump" is still there. I considered maybe a B.C., or a scope height problem but tweaking these things still doesnt make up the difference.
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  #4  
Old 01-05-2014, 12:02 AM
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Re: Dope inconsistancy

You need to take it farther out and get a broader sample.
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  #5  
Old 01-05-2014, 12:14 AM
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Re: Dope inconsistancy

This particular round is a 308 berger 185gn that goes subsonic at 1250yds then gets pretty wild.
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  #6  
Old 01-05-2014, 08:28 AM
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Re: Dope inconsistancy

Are your 100 and 200 yard dopes exactly on?
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  #7  
Old 01-05-2014, 10:48 AM
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Re: Dope inconsistancy

Is there any terrain on the range, and have you checked to make sure that 500 yards is indeed 500 yards.
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