#345042 - 08/15/07 10:25 PM
Re: Where in the heck..
[Re: UPSman]
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Tiny
16 Point
Registered: 02/09/02
Posts: 17602
Loc: Knoxville
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Good Question.Might be listed on there web site or in the catalog.I think I have one of there catalogs around here somewhere.
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#345084 - 08/15/07 10:37 PM
Re: Where in the heck..
[Re: Tiny]
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Tiny
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Well it wasn't listed in there catalog don't know about the web site.
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#345156 - 08/15/07 11:00 PM
Re: Where in the heck..
[Re: Tiny]
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Tiny
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Well I didn't see no where on there web site but this might help.
http://www.fusionammo.com/FusionBallistics.html
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#346326 - 08/16/07 03:46 PM
Re: Where in the heck..
[Re: Tiny]
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UPSman
TnDeer Old Timer
12 Point
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Thanks Tiny, but I have that looked at that ballistics table. I was looking for the BC so that I could put it into this thing here . It may not make that big of a difference, I don't know.
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#347094 - 08/16/07 09:19 PM
Re: Where in the heck..
[Re: UPSman]
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Tiny
16 Point
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Posts: 17602
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Thought that was Why you was wanting to know the BC,and yes it does make a difference in the math,as does other items.How much is the debateable part.
Might have to call fusion and get it. I have called to get ammo company's listed or a bullets BC in the past to use in ballistic programs.
Edited by Tiny (08/16/07 11:42 PM)
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#347719 - 08/17/07 07:59 AM
Re: Where in the heck..
[Re: Tiny]
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.45 COLT
Spike
Registered: 03/26/03
Posts: 45
Loc: North Georgia
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If the Fusion Ballistics Table is correct, then the BC=.510
DC
Edited by .45 COLT (08/17/07 08:00 AM)
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#349300 - 08/17/07 04:51 PM
Re: Where in the heck..
[Re: .45 COLT]
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UPSman
TnDeer Old Timer
12 Point
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Looks like 45 COLT came thru for us Tiny. Thanks man, I appreciate it.
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#350126 - 08/18/07 12:57 AM
Re: Where in the heck..
[Re: .45 COLT]
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Tiny
16 Point
Registered: 02/09/02
Posts: 17602
Loc: Knoxville
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.45 Colt,
Good going on the math or program run through to get that BC. Seems a little high giving the bullets profile from looking at a few loaded rounds.
Either way I would like to know how you came up with it.
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#350172 - 08/18/07 07:20 AM
Re: Where in the heck..
[Re: UPSman]
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.45 COLT
Spike
Registered: 03/26/03
Posts: 45
Loc: North Georgia
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Looked pretty high to me too. That's why I put in the caveat about their Ballistic Table being correct. 
To get the figure, I plugged their figures into an external ballistics program, tweaked the BC until their downrange figures tracked. Then re-checked on two other external ballistics programs.
I think they might be a little optimistic but that's not unusual for manufacturers. One major manufacturer pulled all their rimfire ballistics "information" from their website when they realized that what they were claiming for velocity/drop figures was impossible.
And a caveat of my own: Ballistic Coefficient of a bullet isn't a fixed figure. It can/will vary depending on velocity. Usually this won't make too much difference to most, so it is neglected. The figure given by a manufacturer for a bullet, or the figure calculated, is close enough for any practical work.
DC
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