Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Terminator Ammo Direct


User Tag List

+ Reply to Thread
Results 1 to 7 of 7
Like Tree1Likes
  • 1 Post By 338

Thread: Litz book question

  1. #1
    ebf
    ebf is offline
    Mushroom juice ! Hic ! ebf's Avatar
    Join Date
    Jun 2012
    Location
    Above the Hutt
    Posts
    6,872

    Litz book question

    Busy reading "Accuracy and Precision for Long Range Shooting"

    On page 11 he has a WEZ graph, with two points, one for TS (transonic) and the other for KE (kinetic energy)

    I'm familiar with TS being roughly Mach 1.2 to 0.8.

    Can someone pls try to explain this KE point to me ?
    Viva la Howa ! R.I.P. Toby | Black rifles matter... | #illegitimate_ute

  2. #2
    Member
    Join Date
    Dec 2012
    Location
    Wellington
    Posts
    1,786
    Quote Originally Posted by ebf View Post
    Busy reading "Accuracy and Precision for Long Range Shooting"

    On page 11 he has a WEZ graph, with two points, one for TS (transonic) and the other for KE (kinetic energy)

    I'm familiar with TS being roughly Mach 1.2 to 0.8.

    Can someone pls try to explain this KE point to me ?
    Dont have that book, maybe we can swap to read as I have a new book form the US on Palma and FTR at some point?

    KE would I assume be the mass of the projectile x its velocity, its impact energy? not sure why that matters for target shooting too much...
    "I do not wish to be a pawn or canon fodder on the whims of MY Government"

  3. #3
    ebf
    ebf is offline
    Mushroom juice ! Hic ! ebf's Avatar
    Join Date
    Jun 2012
    Location
    Above the Hutt
    Posts
    6,872
    In this context it does not seem to be terminal kinetic energy in the traditional hunting view.

    He has it as a point along the distance graph, in the same way that for a particular projectile and velocity combo at some distance along the flight path the projectile will enter transonic flight.

    The only thing I can think of is that it is the distance at which a projectile / velocity combo falls below the "magic number" value for KE, like the old 700 ft.lbf for medium sized game ?
    Viva la Howa ! R.I.P. Toby | Black rifles matter... | #illegitimate_ute

  4. #4
    Member
    Join Date
    Dec 2012
    Location
    Wellington
    Posts
    1,786
    Quote Originally Posted by ebf View Post

    The only thing I can think of is that it is the distance at which a projectile / velocity combo falls below the "magic number" value for KE, like the old 700 ft.lbf for medium sized game ?
    Maybe its the same number across a range of calibers? or a method to find that "magic number" across a range of calibers and hence use it as part of a calculation?

    He's starting to discuss things like standard deviation, suggesting a lot of math in there somewhere...

    Maths....ikky....

    tried googling, your Q has made no4 on google's returns....cant find anything to explain it though.
    Last edited by steven; 03-07-2013 at 12:05 PM.
    "I do not wish to be a pawn or canon fodder on the whims of MY Government"

  5. #5
    ebf
    ebf is offline
    Mushroom juice ! Hic ! ebf's Avatar
    Join Date
    Jun 2012
    Location
    Above the Hutt
    Posts
    6,872
    Quote Originally Posted by steven View Post
    He's starting to discuss things like standard deviation, suggesting a lot of math in there somewhere...

    Maths....ikky....
    Hahaha, this might not be the book for you Pretty much the whole thing is statistical analysis of various factors affecting ballistics. Initially looking at factors affecting precision and then accuracy. He isolates one factor, uses computer simulation to build the data sets, and then presents the results in WEZ graphs and tables.

    I've emailed him, will let you know what his answer is.
    Viva la Howa ! R.I.P. Toby | Black rifles matter... | #illegitimate_ute

  6. #6
    338
    338 is offline
    Member 338's Avatar
    Join Date
    Apr 2012
    Location
    .
    Posts
    364
    It is where the energy of the projectile drops below 1000 foot lbs ( energy needed for a effective kill on medium-large game)
    BRADS likes this.

  7. #7
    ebf
    ebf is offline
    Mushroom juice ! Hic ! ebf's Avatar
    Join Date
    Jun 2012
    Location
    Above the Hutt
    Posts
    6,872
    Tx 338

    Yup, he mentions it on p 173, 1000 ft.lbf @ sea level

    The graph on p 11 confused me, coz the values don't work for either 308 175 SMK @ 2600 or 300 WM 230 Berger he uses in the rest of the book. Guess it is just an example. KE at 900 and TS at 1100
    Viva la Howa ! R.I.P. Toby | Black rifles matter... | #illegitimate_ute

 

 

Similar Threads

  1. Bryan Litz books
    By ebf in forum Resource Library
    Replies: 2
    Last Post: 03-04-2013, 08:46 PM
  2. Brian Litz article on measuring COAL
    By stug in forum Reloading and Ballistics
    Replies: 17
    Last Post: 26-03-2013, 10:11 PM
  3. New Litz book - could vindicate the gimp...
    By Wildman in forum Shooting
    Replies: 9
    Last Post: 27-09-2012, 07:34 PM
  4. Which book?
    By moonhunt in forum Hunting
    Replies: 12
    Last Post: 09-12-2011, 08:42 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!