close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics

Reply

JBM Update: Measured BCs added to bullet library

LinkBack Thread Tools Display Modes
  #1  
Unread 07-08-2009, 01:48 PM
Official LRH Sponsor
 
Join Date: Mar 2007
Posts: 633
JBM Update: Measured BCs added to bullet library

On behalf of "JBM Small Arms Ballistics" and "Applied Ballistics, LLC" I would like to announce the addition of measured BC data to the JBM bullet library.

For those who are not familiar with the free JBM online ballistics calculators, this is an excellent resource for making accurate trajectory predictions as well as calculations involving stability, recoil, max range, etc.

When calculating trajectories, users can either enter a numeric BC value manually, or select a bullet from the drop down menu. Until recently, the drop down menu would use the BC that's advertised by the manufacturer. Advertised BCs may or may not be accurate for any number of reasons. Now, the bullet library includes the BCs measured by Applied Ballistics, LLC (Bryan Litz) which are referenced to the G7 standard, and are accurate within +/- 1%.

Click here to read about G7 referenced BCs.

The bullets in the JBM library that use the measured BCs are designated "Litz", as shown in the following graphic. When you select these bullets, the program automatically loads the measured BC for that bullet. Just take care in entering all the other inputs accurately, and the program will output a very precise trajectory.



The numeric BC values of the bullets in the library are not visible to the user. If you want to know the numeric BC values, they're published in the book: " Applied Ballistics For Long Range Shooting " for over 175 long range bullets of all brands, from .22 thru .338 caliber.

Here are some links to the information on the JBM site which explains the new addition in greater detail:
Ballistic Coefficients
Bullet Library

This marriage of accurate data with accurate software will make it easier for shooters to calculate reliable trajectories. You no longer have to get the measured BCs from one place, then go somewhere else to use them; it's all tied together now.

Take care,
-Bryan
Reply With Quote
  •   #2  
    Unread 07-08-2009, 02:32 PM
    Platinum Member
     
    Join Date: Oct 2005
    Location: Michigan
    Posts: 2,232
    Re: JBM Update: Measured BCs added to bullet library

    Bryan,

    Very nice, thanks.

    AJ
    __________________
    If some is good and more is better, then too much is just right.


    My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
    Reply With Quote

      #3  
    Unread 07-08-2009, 07:49 PM
    Official LRH Sponsor
     
    Join Date: Mar 2007
    Location: Montana
    Posts: 2,596
    Re: JBM Update: Measured BCs added to bullet library

    Brian,

    It shouldn't go with out saying, so I wanted to say thank you for all your work.

    Steve
    __________________
    Hammer Bullets
    Advanced Technology
    Simply Better


    To hunt... or not to hunt...? What a stupid question.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: JBM Update: Measured BCs added to bullet library
    Thread Thread Starter Forum Replies Last Post
    Would you participate in a LRH library? crowsnest2002 General Discussion 1 11-25-2010 01:17 PM
    Measured headspace variation Stevanda Reloading 5 07-26-2010 04:22 PM
    7mm wsm--this years long range hunting system--video added now pictures added tjonh2001 Gun Photos 24 11-29-2008 12:47 PM
    Aluminum Tipped bullet update Lightvarmint Rifles, Bullets, Barrels & Ballistics 8 04-30-2008 08:54 AM


    All times are GMT -5. The time now is 11:42 AM.


    Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC