Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

steep shots, cosine and wind...

 
LinkBack Thread Tools Display Modes
  #1  
Old 09-25-2009, 04:30 PM
Silver Member
 
Join Date: Jun 2003
Location: Aussie in Italy
Posts: 304
steep shots, cosine and wind...

I’ve got a question regarding the cosine of an angled shot, time of flight, and the effects of wind.

To start out with the obvious, cosine will give you the correct distance to consider when you make an angled shot.

The rangefinder will give you the line of sight distance to the target, which calculations aside, remains the actual distance your bullet must cover.

So using the ACI for example, we can calculate, using cosine, the distance over which the shot will be effected by gravity, and make adjustments to the drop.

However we are still actually shooting the line of sight distance, which is where the time of flight comes from.
During that time, wind will effect the bullet the same as if it were on the level plane.

So when making an angled shot in wind, you should compensate for wind over the actual line of sight distance, not the cosine distance.Right?


Feel like I'm stating the obvious, but no one seems to have mentioned it…

Last edited by EXPRESS; 09-26-2009 at 02:17 AM.
Reply With Quote
  #2  
Old 09-25-2009, 06:00 PM
Platinum Member
 
Join Date: Jun 2007
Location: PUEBLO, CO, USA
Posts: 1,096
Re: steep shots, cosine and wind...

...all that said, remember Jack O'Connor's famous words "HOLD LOW" (if its steep up or down shot).

I gotta laff at the tv hunting shows in the high mtns. EVERY missed shot( and there are a LOT of them shown on the boobtoob now) is HIGH when on a steep angle shot. It would seem like if a guys spendin 30k on a hunt he otto know how to shoot. I guess even tons of $$$ dont make up for stupidity.
__________________
svenska50@hotmail.com

NRA Life Member
Reply With Quote
  #3  
Old 09-25-2009, 09:59 PM
Platinum Member
 
Join Date: Dec 2008
Location: Grantsville Utah
Posts: 3,473
Re: steep shots, cosine and wind...

That is correct but don't forgrt that up and down slope winds can affect drop as well...Goood shooting......Rich
Reply With Quote
  #4  
Old 09-26-2009, 01:15 AM
Platinum Member
 
Join Date: Jul 2007
Location: Arkansas (Home of Record)
Posts: 1,300
Re: steep shots, cosine and wind...

Express, you are correct.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: steep shots, cosine and wind...
Thread Thread Starter Forum Replies Last Post
Do you use an Angle Cosine Indicator (ACI) for uphill/downhill shots? Len Backus Polls 75 11-13-2013 02:19 PM
Cosine Chart C.O. Shooter Long Range Hunting & Shooting 10 10-03-2011 07:54 AM
starter budget cheap wind meter...that still reads wind!?! hmbleservant Long Range Hunting & Shooting 3 06-25-2011 10:43 PM
Shooting at steep angles. zjfty9 The Basics, Starting Out 5 05-19-2008 04:09 PM
Help: Gun vs.Target - steep shots, barometric adjustments with big elevation change? WildcatB Rifles, Bullets, Barrels & Ballistics 17 03-04-2008 07:21 PM


All times are GMT -5. The time now is 11:04 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC