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Need a long range ballistic program.......

 
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  #29  
Old 12-18-2006, 09:36 AM
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Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
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Re: Need a long range ballistic program.......

With a medium caliber such as the 308 with moderate velocity say 2550 you can have a BC error of about .040 and still hit the kill zone of a deer. You will need accurate pressure (altitude if you cant get pressure), temperature, velocity, scope height and angle of fire. If you enter correct air density, then 90% of the time using a rough estimate on your BC will get you fairly close at 600 and under. With a flatter shooting cartridge, it will be more forgiving.

Bear in mind I dont advocate trying to kill game with an unverified BC. The point in this thread is to show the limits of ballistic calculators without verifying data. Its that 10% that will cause a wounded loss. ALWAYS verify before attempting to harvest game.
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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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  #30  
Old 12-18-2006, 10:27 AM
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Join Date: Feb 2006
Location: Nottingham, UK
Posts: 261
Re: Need a long range ballistic program.......

hi
i was just wondering how far i would be out with a new round i will be developing in the next few weeks. just to get me on the paper with out putting up a large target.

Colin
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