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Ballistic comparisons, give me you numbers.

 
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  #1  
Old 10-23-2005, 07:07 AM
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Ballistic comparisons, give me you numbers.

I'd like to compile a spreadsheet of the different LR calibers/bullets that are used here, so I can do a side-by-side comparisonn to better understand the strengths of the different options LR shooters have. I'd like to show drops and drift for the different options. I have one of the free ballistic programs, so I could use Muzzle vel + BC + caliber + weight. Or I can figure the drops via a couple of Velocities and different distances + Weight + caliber.

Obviously, compared in this way several of the choices will be rather close. I just want to put together a thumbnail sketch of the choices.

To make it fair I will need Barrel length as well.

For the factory chamberings, I can get close data from my reloading manuals. The information I am in need of are the various Wildcats.

thanks,
AJ
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Old 10-23-2005, 07:39 AM
 
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Re: Ballistic comparisons, give me you numbers.

Aj,

what you are asking would take someone a hours to do.

My best advice is for you to buy the Exbal Program, the Sierra Infinity Program or goto one of the Web based ballistic programs that Dave King has posted about. ( try a serch for it ) or go to the bullets barrels and ballistics area. If you do not know the BC of the bullets you can go to any manufacturers sight and they will have the B.C.'s listed. I know Exbal and the good ballistics programs have most bullets and the BC' already in them.

hope this helps...
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Old 10-23-2005, 08:08 AM
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Re: Ballistic comparisons, give me you numbers.

Ric,

Thats just it. I doubt the programs have the 277AM 338Edge etc. in them. Especially with the specialty bullets these guys are using. I agree, the factory stuff is easy to get. What I need is the raw data from the 'Wildcats' so I can make a decision as to which 'build' will best suit my needs.

If Exbal has these calibers/cartridges etc. in them, then I will order it today.

AJ
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Old 10-23-2005, 09:25 AM
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Re: Ballistic comparisons, give me you numbers.

AJ,

I can tell you for the 270 AM, use a BC of .740 for the 169.5 WC. We are pushing these between 3400-3450 fps with full tilt loads.

As far as the 185 gr goes, I would use a BC of .820 + or - for some estimates. I don't think 3200 fps is out of the question w/the 270 AM and this bullet.

On other calibers, just look around here and find some reported velocities and note the bullets used. You can look up any of the commercially available bullet BCs online.

Hope this helps.
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Old 10-23-2005, 09:27 AM
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Re: Ballistic comparisons, give me you numbers.

Bill,

Thanks, thats exactly what I am looking for. What barrel length are you running?

I'll add some factory chamberings to my spreadsheet/charts so everyone will have a point of reference.

Thanks again,
AJ
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  #6  
Old 10-23-2005, 09:34 AM
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Re: Ballistic comparisons, give me you numbers.

30"
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  #7  
Old 10-23-2005, 11:08 AM
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Re: Ballistic comparisons, give me you numbers.

What your asking us for is ridiculous.
But the data your looking for, even for wildcats, but minus the custom bullets, can be pulled up in RCBS.Load
http://www.gmdr.com/rcbs/rcbs.htm

This is a compilation of load manuals(all I believe), it's relatively cheap, free online updates about every week. And best of all, comes bundled with Cartridge Design. Best I've seen for researching and designing cartridges offline.

There is also, The Reload Bench. Super source for user information. www.reloadbench.com
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