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Nosler BT 6.5, 140 velocity decay #14132100 09/17/19
Joined: Aug 2018
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dSmith_45 Offline OP
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Hello.

If someone with a ballistics program can help

If I launch a Nosler Ballistic Tip 6.5mm, 140 grain at 2750 fps. At what distance does it fall below the 1800 fps minimum performance threshold Nosler states?

BC= 0.509. Boat tail design. Use default values for elevation, temp, etc. If a cartridge case is required use Creed or Sweade. It will actually be x57r or x65r. I'm trying to decide. I just need a ball park number. I imagine it is further than ethical hunting range.

Thanks.

300 BP

Re: Nosler BT 6.5, 140 velocity decay [Re: dSmith_45] #14132150 09/17/19
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Azar Offline
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There are many free, excellent ballistics programs available on-line including those provided by most bullet manufacturers. One of the best is JBM Ballistics.

Just select your bullet from the drop-down list and input your velocity, zero range, etc here.


“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear
Re: Nosler BT 6.5, 140 velocity decay [Re: dSmith_45] #14132172 09/17/19
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dSmith_45 Offline OP
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Thanks for link! Somewhere between 500 & 600 yards.

I bookmarked that. Thanks again.

Re: Nosler BT 6.5, 140 velocity decay [Re: dSmith_45] #14148590 09/23/19
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Tejano Offline
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I find Nosler's velocity thresholds conservative at both ends. I wouldn't push it too far on the low end but on the high end I have exceeded the recommended velocity by 2-300 fps and they worked fine. The 57 & 65mm are dandy cartridges. I have the horn on for a 6.5x65 AI in a single shot rifle. A lot of trouble to slightly best the 270 Win. but who cares?


"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
Re: Nosler BT 6.5, 140 velocity decay [Re: Tejano] #14183575 10/07/19
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calikooknic Offline
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IF I ever get my 35 Whelan AI done, I'd like to try a 6.5-280AI. Just neck down available brass and go.



Sean
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Re: Nosler BT 6.5, 140 velocity decay [Re: calikooknic] #14187660 10/08/19
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Tejano Offline
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Originally Posted by calikooknic
IF I ever get my 35 Whelan AI done, I'd like to try a 6.5-280AI. Just neck down available brass and go.


Every time I look at my 280 AI reamer it is in danger of having half a mm ground off it.


"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli

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