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

Dual Loads for One Rifle, Help

LinkBack Thread Tools Display Modes
  #1  
Unread 04-03-2010, 11:39 PM
Silver Member
 
Join Date: Feb 2007
Location: San Jose, Ca
Posts: 268
Dual Loads for One Rifle, Help

I am currently working with my 338 Lapua and am having issues sorting out what to do. I have two different load that I use for hunting.

My First load is a 225 grain AB. This is what I call my easy/cheap to shoot load. Good for most things out to 1000 yards and the rifle does not jump around that much. I have the rifle zeroed at 100 yards with this load.

My second load is a 300 grain SMK. This what I am using to shoot to long range (1000 and further). When I shoot this load at 100 yards with my 225 grain zero it shoot to the left 2" and down 2.25". So in my mind this should be easy. If I want to shoot the 300 grain bullet with the 225 grain zero I should just go up 2.25MOA and right 2MOA. This should zero the rifle and then I add my drop and windage for what ever I am shooting to.

Does this seam correct?

The second part of the story:
I shot to 300, 500 and 800 yards today. With the 225 grain zero my drops and windage came out as follows:

Yardage Elev(MOA) Wind(MOA)
100 2.25 2.00R
300 7.5 1.75R
500 12.75 1.25R
800 22.25 1.00R

Now there was some wind (5MPH max) but is was a pretty calm day. When I subtract 2.25 MOA zero off set I am having trouble getting any drop chart to match up. I have been working with exbal for a good hour trying to match the drop and can not get anything to match up close to the drop chart I am seeing when I sight in the rifle.

Anyone have any suggestion or better ideas to get this to work?

Thanks in advance.
SES50
__________________
Firearms stand next in importance to the Constitution itself. They are the American people's liberty teeth and keystone under independence. The very atmosphere of firearms everywhere restrains evil interference. - George Washington

Peace is that brief glorious moment in history when everybody stands around reloading.' -Unknown

Last edited by SES50; 04-04-2010 at 12:51 PM.
Reply With Quote
  •   #2  
    Unread 04-04-2010, 06:45 AM
    Platinum Member
     
    Join Date: Jun 2001
    Location: Potomac River
    Posts: 5,071
    Re: Dual Loads for One Rifle, Help

    Nobody can do anything with out a muzzle velocity.

    Second it is not clear what bullet was fired to produce those drops.
    __________________
    The Smokin Fur Rifle Club
    Reply With Quote

      #3  
    Unread 04-04-2010, 12:59 PM
    Silver Member
     
    Join Date: Feb 2007
    Location: San Jose, Ca
    Posts: 268
    Re: Dual Loads for One Rifle, Help

    Quote:
    Originally Posted by Buffalobob View Post
    Nobody can do anything with out a muzzle velocity.

    Second it is not clear what bullet was fired to produce those drops.
    I thought I was pretty clear.

    225gr AB
    300gr SMK

    I do not understand why giving you the muzzle velocity is going to help you in determining if I am correct with my assumption on the fundimentals of adding a second load to a rifle that is zeroed with the primary load.

    Muzzle Velocity on 225gr AB is 3113 fps
    Muzzle Velocity on 300gr SMK is 2774 fps

    Hope this Helps
    SES50
    __________________
    Firearms stand next in importance to the Constitution itself. They are the American people's liberty teeth and keystone under independence. The very atmosphere of firearms everywhere restrains evil interference. - George Washington

    Peace is that brief glorious moment in history when everybody stands around reloading.' -Unknown
    Reply With Quote
      #4  
    Unread 04-04-2010, 04:19 PM
    Platinum Member
     
    Join Date: Jun 2001
    Location: Potomac River
    Posts: 5,071
    Re: Dual Loads for One Rifle, Help

    I am easily confused and that is why I don't try to do what you are doing.


    Here is an interesting number for you to ponder. 4.1 MOA

    Your 300 yard drops are off by 4.1 MOA
    Your 500 yard drops are off by 4.1 MOA
    Your 800 yard drops are off by 4.1 MOA
    __________________
    The Smokin Fur Rifle Club
    Reply With Quote
      #5  
    Unread 04-04-2010, 04:55 PM
    Platinum Member
     
    Join Date: Feb 2005
    Location: USA
    Posts: 2,598
    Re: Dual Loads for One Rifle, Help

    I am a firm believer in the KISS principal (Keep It Simple Stupid) I use one load in my 338 Lapua and that is the 300 SMK.. Works for me
    __________________
    range it,check the wind, dial in correction, aim and only one shot
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: Dual Loads for One Rifle, Help
    Thread Thread Starter Forum Replies Last Post
    WTS: HAWKE Crossbow 3x32 Rifle scope with SR Dual Color Reticle (HK3244) Weby Shops Optics For Sale 0 11-25-2010 04:47 PM
    WTS: 3-9x44 Dual Color BDC IR Rifle Scope by TruGlo Weby Shops Optics For Sale 0 10-30-2010 05:41 PM
    Dual duty scope help. benjamin199 Long Range Scopes and Other Optics 1 03-15-2010 12:37 PM
    factory loads for new rifle tommyc279 Rifles, Bullets, Barrels & Ballistics 2 12-15-2008 09:41 PM
    Loads for 338 HS heavy tactical rifle ? Down Under Hunter Rifles, Bullets, Barrels & Ballistics 5 01-08-2008 03:54 AM


    All times are GMT -5. The time now is 09:14 AM.


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