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

velocity

LinkBack Thread Tools Display Modes
  #1  
Unread 08-28-2011, 12:50 PM
Bronze Member
 
Join Date: Jul 2011
Location: Bend Oregon
Posts: 94
velocity

I am getting started into reloading now for about a year, I dont have a chronograph yet but am working off the reload data in the reloading books to estimate bullet speed, (MV) the test barrels are 24 " mine are 26 " I'm shooting a 260 rem, and a 22-250 is there any rule of thumb to estimate velocity from 2 inch extra barrel ? Thanks in advance Scott
Reply With Quote
  •   #2  
    Unread 08-28-2011, 01:35 PM
    Silver Member
     
    Join Date: Aug 2009
    Location: Carlisle, PA
    Posts: 478
    Re: velocity

    Quote:
    Originally Posted by D Scott View Post
    I am getting started into reloading now for about a year, I dont have a chronograph yet but am working off the reload data in the reloading books to estimate bullet speed, (MV) the test barrels are 24 " mine are 26 " I'm shooting a 260 rem, and a 22-250 is there any rule of thumb to estimate velocity from 2 inch extra barrel ? Thanks in advance Scott
    I've found MV can differ from published MV by a surprising amount even in the same length barrel. I'd even go so far as to say the published MV are frequently almost useless beyond the conclusion that more powder will make the bullet go faster, and this powder might be faster than that powder.

    The same load can differ by 150 fps between two rifles of the same barrel length. IMO, there really isn't any good alternative to measuring MV if one want's to know how fast the bullet is going.

    Fitch
    __________________
    "For a successful technology, reality must take precedence over public relations, for nature cannot be fooled." R. Feynman. (Last sentence of the Feynman appendix to the Space Shuttle Challenger Report.)
    Reply With Quote

      #3  
    Unread 08-28-2011, 03:04 PM
    Bronze Member
     
    Join Date: Jul 2011
    Location: Bend Oregon
    Posts: 94
    Re: velocity

    thanks for the heads up, I will try to get use of a chrono and get it dialed in a little more tight, I thought the books might be a little closer.thanks Scott
    Reply With Quote
      #4  
    Unread 08-28-2011, 04:54 PM
    Platinum Member
     
    Join Date: Jan 2008
    Location: Falls Church, VA
    Posts: 3,474
    Re: velocity

    While I generally agree with Fitch, I would add that in-general you gain/lose about 20-25fps per inch of barrel.

    Chrono is a relatively inexpensive tool to acquire. They start around $90. Here's the one I use with good results...

    Shooting Chrony F1 Master Chronograph - MidwayUSA
    __________________
    I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!
    Reply With Quote
      #5  
    Unread 08-28-2011, 05:04 PM
    Bronze Member
     
    Join Date: Jul 2011
    Location: Bend Oregon
    Posts: 94
    Re: velocity

    thanks for the feedback, I guess Im going to pony up $ and just get one, but that leads me to another question, is there any value in doing load development at 50 yrds vs 100 yrds to reduce the human error variable ? my goal is to work up to 1000 yrd distance thanks Scott
    Reply With Quote
      #6  
    Unread 08-28-2011, 05:19 PM
    Platinum Member
     
    Join Date: Jan 2008
    Location: Falls Church, VA
    Posts: 3,474
    Re: velocity

    Quote:
    Originally Posted by D Scott View Post
    thanks for the feedback, I guess Im going to pony up $ and just get one, but that leads me to another question, is there any value in doing load development at 50 yrds vs 100 yrds to reduce the human error variable ? my goal is to work up to 1000 yrd distance thanks Scott
    Although many conduct load development at 100 yards, best results will be seen at 200 or 300 yards.

    For instance, I will often conduct my initial load development with the chronograph at 100 yards. Then when I find a load that I think is working (provides .5moa groups or better and a low extreme-spread), I will then stretch out to 200+ in order to truly determine accuracy and confirm velocity data.
    __________________
    I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!
    Reply With Quote
      #7  
    Unread 08-28-2011, 07:23 PM
    Bronze Member
     
    Join Date: Jul 2011
    Location: Bend Oregon
    Posts: 94
    Re: velocity

    Thanks for the advice
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: velocity
    Thread Thread Starter Forum Replies Last Post
    300 WBY velocity ??? remingtonman_25_06 Reloading 14 12-15-2013 07:20 AM
    200 LRX velocity Tikkamike Reloading 1 08-30-2011 04:28 PM
    What Velocity with .300 win mag and 210 VLD jayph Rifles, Bullets, Barrels & Ballistics 3 11-17-2010 04:55 PM
    7-08 velocity ? winmagman Reloading 0 09-09-2010 06:28 PM
    7mm Rem Mag velocity? bosstom Rifles, Bullets, Barrels & Ballistics 5 12-01-2009 06:49 PM


    All times are GMT -5. The time now is 03:29 AM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC