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ballistic coefficient questions . 6.5 mm bullets

 
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  #8  
Old 01-12-2013, 08:14 PM
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Re: ballistic coefficient questions . 6.5 mm bullets

Most manufacturers do overstate their bullet's BC's. Bryan Litz has tested many of the popular bullets and printed the results in his books, Applied Ballists. In the first volume he lists the 130 Scirocco with a G1 BC of .491 averaged from 3000 to 1500 fps. He does not list the 140 SST, but rates the 129 gr SST and 140 A-Max at .483 and .584 respectively. He rates the 140 AB @ .487
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  #9  
Old 01-12-2013, 09:22 PM
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Re: ballistic coefficient questions . 6.5 mm bullets

OK. Well the Hornady book lists the same BC figures for the 129 SST and the 140 A MAX . So they look reliable. I don't like bullets that are real fragile as I will get a lot more close range shots than even 500 yard ones.
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  #10  
Old 01-12-2013, 09:49 PM
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Re: ballistic coefficient questions . 6.5 mm bullets

Quote:
Originally Posted by Cold Trigger Finger View Post
OK. Well the Hornady book lists the same BC figures for the 129 SST and the 140 A MAX . So they look reliable. I don't like bullets that are real fragile as I will get a lot more close range shots than even 500 yard ones.
The SST is one of the more frangible bullets you could be shooting, far more than a 140 Berger.
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  #11  
Old 01-13-2013, 12:30 AM
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Re: ballistic coefficient questions . 6.5 mm bullets

If you decide to go with bullets in the 130g weight range, the Hornady 6.5 bullets in that weight range are a good choice. The 129g SST's are inexpensive to shoot and can be reserved for use at longer ranges where their frangibility is an asset because of lower impact velocities. Hornady also offers the 129g Interbond, which would give you the option to use the tougher bullet at shorter range.

The bc for the two bullets is identical. Given careful load development, I would expect the two bullets to have similar POI's. It could be a useful pairing. I just wish Hornady would do something similar in the 140g range to offer a tougher bullet to pair with the 140g AMAX.

In my faster 6.5's, I am pairing the AMAX with Partitions. In my Swedes, I am using Bergers. I don't think they are fast enough to really need a tougher bullet.
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  #12  
Old 01-13-2013, 03:24 AM
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Re: ballistic coefficient questions . 6.5 mm bullets

I thot the SST was basically a slicked up Interlock.
I wish Barnes would make a 140 gr TTSX. And that ATF would let them make their Banded Solids again.

Ive never shot a Berger bullet. Just never liked their description of the bullet shedding weight. . .
It would be nice if Hornady made a 140 gr Interbond

I'll research the Bergers . Thanks again. !
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  #13  
Old 01-13-2013, 03:30 AM
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Re: ballistic coefficient questions . 6.5 mm bullets

Quote:
Originally Posted by MontanaRifleman View Post
Most manufacturers do overstate their bullet's BC's. Bryan Litz has tested many of the popular bullets and printed the results in his books, Applied Ballists. In the first volume he lists the 130 Scirocco with a G1 BC of .491 averaged from 3000 to 1500 fps. He does not list the 140 SST, but rates the 129 gr SST and 140 A-Max at .483 and .584 respectively. He rates the 140 AB @ .487
Thanks. Are there any sponsors here that sell this book that you know of. Or do you know where I could get a copy? ?
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  #14  
Old 01-13-2013, 08:49 AM
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Re: ballistic coefficient questions . 6.5 mm bullets

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