» Advanced

Go Back   Shooters Forum > Rifle and Rifle Cartridges > Rifles and Rifle Cartridges
Register FAQ Members List Donate Calendar Search Today's Posts Mark Forums Read



Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1  
Old 09-30-2009, 07:43 PM
Skyler's Avatar
Beartooth Regular
 
Join Date: Sep 2009
Posts: 132
.338-378 Weatherby Magnum facts


Registered Users do not see the above ad.


I'm searching for some information regarding the .338-378 Weatherby Magnum. Specifically I'd like a ballastics table out to 1000 yards using 200gr, 225gr and 250gr bullets (a 300gr bullet would be nice for reloading reasons). Personal handloads and factory ammo is what I'm looking for in the table. Another thing is the barrel life of the rifle (Weatherby Mark V Accumark), I know the 30-378 has a very short barrel life and am interested to see a comparison. Thanks.
Reply With Quote
  #2  
Old 10-01-2009, 01:26 AM
Beartooth Regular
 
Join Date: Mar 2008
Location: Melbourne,Australia
Posts: 342
The ballistics table is dependent on a few factors, such as velocity and bullet BC, so all I can suggest is for you to download a program such as "PointBlank", which is a free ballistics program.

Now, to the rifle barrel life question. The 338-378WM will have, on average, a life of around 600 rounds before the throat is eroded enough to affect velocity, this is the thing that you need to keep watch of during use, when the velocity drops with all the components the same, that's throat erosion, how much it drops, I can't tell you. I also can't tell you at what point in the barrels life this will occur. This can only be used if you chrono your ammo every now and then, if you don't, then the only way to tell is when accuracy drops off to a point that it can't be relied upon to hit what you're aiming at.

After this point is reached, it will progress until accuracy starts to fall off in a big way.
If you are using factory ammo for the life of the rifle, and you don't burn it out sighting it in, it may give you a life time of use.
__________________
Magnums RULE
Reply With Quote
  #3  
Old 10-01-2009, 02:25 AM
Tang's Avatar
Beartooth Regular
 
Join Date: Feb 2004
Location: Virginia
Posts: 3,262
Weatherby factory ammo, has a 225gr Barnes TSX moving out at 3180. Soooo...

<TABLE border=0 cellSpacing=0 cellPadding=0><CAPTION>Ballistics Table in Yards</CAPTION><TBODY><TR><TD><TABLE border=1 cellSpacing=1 cellPadding=2 width="100%"><TBODY><TR><TD align=left>.338-378 Wby 225 gr., .482 B.C. 250 Yard Zero</TD><TD align=right>www.hornady.com</TD></TR></TBODY></TABLE></TD></TR><TR><TD><TABLE border=2 cellSpacing=1 cellPadding=2><TBODY><TR><TD>Range (yards)</TD><TD align=middle>Muzzle</TD><TD align=middle>100</TD><TD align=middle>200</TD><TD align=middle>300</TD><TD align=middle>400</TD><TD align=middle>500</TD><TD align=middle>600</TD><TD align=middle>700</TD><TD align=middle>800</TD><TD align=middle>900</TD><TD align=middle>1000</TD></TR><TR><TD>Velocity (fps)</TD><TD align=middle>3180 <TD align=middle>2975 <TD align=middle>2779 <TD align=middle>2592 <TD align=middle>2412 <TD align=middle>2239 <TD align=middle>2074 <TD align=middle>1915 <TD align=middle>1765 <TD align=middle>1624 <TD align=middle>1493</TD><TR><TD>Energy (ft.-lb.)</TD><TD align=middle>5052 <TD align=middle>4421 <TD align=middle>3858 <TD align=middle>3356 <TD align=middle>2906 <TD align=middle>2505 <TD align=middle>2148 <TD align=middle>1833 <TD align=middle>1556 <TD align=middle>1317 <TD align=middle>1113</TD><TR><TD>Trajectory (250 yd. zero)</TD><TD align=middle>-1.5 <TD align=middle>2.1 <TD align=middle>1.8 <TD align=middle>-3.0 <TD align=middle>-12.9 <TD align=middle>-28.9 <TD align=middle>-51.8 <TD align=middle>-82.7 <TD align=middle>-123.2 <TD align=middle>-174.9 <TD align=middle>-239.8</TD><TR><TD>Come Up in MOA</TD><TD align=middle>-1.5 <TD align=middle>-2.0 <TD align=middle>-0.9 <TD align=middle>1.0 <TD align=middle>3.1 <TD align=middle>5.5 <TD align=middle>8.2 <TD align=middle>11.3 <TD align=middle>14.7 <TD align=middle>18.6 <TD align=middle>22.9</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>

Note the velocity at 800 yards. I'm not sure about the TSX min, but a Nosler Accubond has a min impact velocity of 1800 fps.

One more

<TABLE border=0 cellSpacing=0 cellPadding=0><CAPTION>Ballistics Table in Yards</CAPTION><TBODY><TR><TD><TABLE border=1 cellSpacing=1 cellPadding=2 width="100%"><TBODY><TR><TD align=left>.338-378 Wby, Nosler Partition 250 gr., .473 B.C. , 250yd Zero</TD><TD align=right>www.hornady.com</TD></TR></TBODY></TABLE></TD></TR><TR><TD><TABLE border=2 cellSpacing=1 cellPadding=2><TBODY><TR><TD>Range (yards)</TD><TD align=middle>Muzzle</TD><TD align=middle>100</TD><TD align=middle>200</TD><TD align=middle>300</TD><TD align=middle>400</TD><TD align=middle>500</TD><TD align=middle>600</TD><TD align=middle>700</TD><TD align=middle>800</TD><TD align=middle>900</TD><TD align=middle>1000</TD></TR><TR><TD>Velocity (fps)</TD><TD align=middle>3060 <TD align=middle>2857 <TD align=middle>2663 <TD align=middle>2476 <TD align=middle>2298 <TD align=middle>2127 <TD align=middle>1963 <TD align=middle>1808 <TD align=middle>1661 <TD align=middle>1524 <TD align=middle>1400</TD><TR><TD>Energy (ft.-lb.)</TD><TD align=middle>5198 <TD align=middle>4530 <TD align=middle>3935 <TD align=middle>3404 <TD align=middle>2931 <TD align=middle>2511 <TD align=middle>2139 <TD align=middle>1814 <TD align=middle>1531 <TD align=middle>1290 <TD align=middle>1087</TD><TR><TD>Trajectory (250 yd. zero)</TD><TD align=middle>-1.5 <TD align=middle>2.4 <TD align=middle>2.0 <TD align=middle>-3.3 <TD align=middle>-14.2 <TD align=middle>-31.7 <TD align=middle>-57.0 <TD align=middle>-91.3 <TD align=middle>-136.2 <TD align=middle>-193.8 <TD align=middle>-266.6</TD><TR><TD>Come Up in MOA</TD><TD align=middle>-1.5 <TD align=middle>-2.3 <TD align=middle>-0.9 <TD align=middle>1.0 <TD align=middle>3.4 <TD align=middle>6.1 <TD align=middle>9.1 <TD align=middle>12.4 <TD align=middle>16.3 <TD align=middle>20.6 <TD align=middle>25.5</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>


You can look at factory Weatherby ammo and ballistics here http://www.weatherby.com/product/ammunition/ballistic

And Hornady has a free, online ballistics calculator here http://www.hornady.com/ballistics/ba...calculator.php
__________________
Volatile & Unstable

Last edited by Tang; 10-01-2009 at 02:30 AM.
Reply With Quote
  #4  
Old 10-01-2009, 08:39 AM
M1Garand's Avatar
Beartooth Regular
 
Join Date: Sep 2004
Location: Michigan
Posts: 2,277
If you're going to spend that kind of money, get the true king of the 338's: the 8.59 Titan from Lazzeroni. It shoots a 225 at 3300 fps or a 250 as fast as the 338-378 shoots a 225.
__________________
Reply With Quote
  #5  
Old 10-01-2009, 12:41 PM
Skyler's Avatar
Beartooth Regular
 
Join Date: Sep 2009
Posts: 132
Thanks for the information. Only 600 round barrel life? **** thats extremely low, about 6 years or so with the amount I'd like to shoot it.
Reply With Quote
  #6  
Old 10-02-2009, 07:23 AM
M1Garand's Avatar
Beartooth Regular
 
Join Date: Sep 2004
Location: Michigan
Posts: 2,277
Performance definately has a price. Personally I think your best bet is either the 300 or 338 RUM. Not too far off the Weatherby's based on the 378 case, ammo is less expensive (or brass if you load later) and you can get rifles based on the great Remington action.
__________________
Reply With Quote
  #7  
Old 02-27-2010, 07:42 PM
Registered User
 
Join Date: Feb 2010
Location: Union, Maine (Midcoast) USA
Posts: 1
Quote:
Originally Posted by M1Garand View Post
If you're going to spend that kind of money, get the true king of the 338's: the 8.59 Titan from Lazzeroni. It shoots a 225 at 3300 fps or a 250 as fast as the 338-378 shoots a 225.
I'm intrigued with the Lazzeroni 8.59 Titan 225gr 338-378 for a Weatherby Mark V Deluxe I'm looking to buy. I noticed the ballistics chart on the Lazzeroni site didn't list ballistic coefficients. Any suggestions for I how I would calculate these? It's info I'd need for having custom elevations and windage BCD dials added to a Leupold scope. The chart says to contact the bullet manufacturer for the B/C. Who should I be contacting specifically?

Here's the chart they've got posted:





Thanks.


John

Last edited by Diavolicchio; 02-27-2010 at 07:44 PM.
Reply With Quote
  #8  
Old 02-27-2010, 07:53 PM
Registered User
 
Join Date: Feb 2010
Location: In a State of Confusion
Posts: 17
8.59 Titan
185gr BC is 0.480
225gr BC is 0.510
250gr BC is 0.540
__________________
Recoil is God's way of letting you know the power in which you hold
Reply With Quote
  #9  
Old 02-27-2010, 08:16 PM
Beartooth Regular
 
Join Date: Dec 2009
Location: Scottsbluff NE
Posts: 283
Diawhatever,
I'd opt a plain jane turret. MOA is your friend. Switch up loads, just shoot to find out the adjustments and record them.

Lazzeroni supposedly uses questionable tact in attaining ballistic info, and I just flat wouldn't trust factory printout 'til I shot to find out. I'd rather dump my change on something else...but fat wallets can sometimes rake in stuff that works.
Reply With Quote
  #10  
Old 02-28-2010, 01:45 AM
mattsbox99's Avatar
Beartooth Regular
 
Join Date: Mar 2003
Location: Havre, Montana
Posts: 6,283
You guys quoting off factory websites and claiming them as fact have a lot to learn. I'm not trying to be a dick, but every rifle is different, some may be faster than the published velocity, the vast majority are slower.

Additionally, there is more than one BC for bullets, based on the speed, so a hard BC is worthless if you don't know the velocity it was launched at.
__________________
Buy American, it may be your own job you are saving.
UTU, TY&E Service, BNSF
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
264 Weatherby Magnum panhandlepr Wildcat Cartridges 9 04-06-2012 05:03 PM
The .338 Winchester Magnum Tang Rifles and Rifle Cartridges 41 06-24-2009 12:37 AM
Weatherby Mark V caliber: Standard or Weatherby magnum JohnM. Rifles and Rifle Cartridges 15 06-08-2008 01:12 PM
Building a 240 Weatherby Magnum... ASSASSIN Rifles and Rifle Cartridges 7 04-18-2008 08:21 PM
Building A Cartridge Display Board piperpilot1 General Discussion 5 04-17-2008 06:52 PM


All times are GMT -8. The time now is 07:26 PM.

< Contact Us - Shooters Forum - Archive >

 
 

All Content & Design Copyright © 1999-2002 Beartooth Bullets, All Rights Reserved
View Privacy Policy | Contact Webmaster | Legal Information
Website Design & Development By Exbabylon Internet Solutions
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0 PL2