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Question about Wildcat bullets--BCs

 
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  #8  
Old 03-16-2007, 04:34 PM
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Re: Question about Wildcat bullets--BCs

I also use 0.740 BC for the 169.5 gr ULD RBBT. Don;t mess with the lighter ones, no reason to for what I use the 270 for.

This BC works very well for muzzle velocities from 3200 to 3400 fps at 3300 ft altitude. I have tested out to 2200 yards with this bullet and from dial up figures this BC holds pretty damn close out to that range so I figure its a good average BC for out to extreme range.

Do not know if the BC drops with lower muzzle velocities but I doubt that it does much.

Again, these BC numbers are what I need to put into my Exbal program to get the predicted bullet flight to match actual bullet flight.

It may not be the pure scientific BC but its what I have to use if I want to hit what I am shooting at at long range.

Kirby Allen(50)
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  #9  
Old 03-17-2007, 11:24 PM
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Re: Question about Wildcat bullets--BCs

I learned alot on here so far , Time to school me some more .
Am trying Richards 150 RBBT ULD's in my 7 mm STW normaly I shoot swift scircco 150's at Taken data loads of 3400fps.
I don't have a Crono ,( next piece to buy).The Swift has a BC of .515 are Richards that much higher BC. In the 600 range or 700 . In the program in this post how do you know What the G factor is .
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  #10  
Old 03-18-2007, 05:59 AM
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Re: Question about Wildcat bullets--BCs

Whenever I use JBM to calculate tradjectories, I honestly just ignore it and go w/ G1, seems to work. I know this isnt' the answer that you were looking for, but it's all I got lol! Maybe someone a little more knowledgeable about ballistics can tell us!
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  #11  
Old 03-19-2007, 12:30 PM
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Re: Question about Wildcat bullets--BCs

The reasons I also asked about the lighter bullets is for the standard 270 Win.

Anyone having info on those, it would be very helpful...thanks.
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  #12  
Old 03-22-2007, 08:06 AM
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Re: Question about Wildcat bullets--BCs

Anyone on the smaller bullets? BCs?
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