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

200yd shooting in 100yd hole?

LinkBack Thread Tools Display Modes
  #1  
Unread 10-26-2013, 01:14 AM
Platinum Member
 
Join Date: Oct 2012
Posts: 1,277
200yd shooting in 100yd hole?

Ok, new to most of this but very puzzled by this. Shooting 280rem, 168 hybrid berger, 56.5g 4831sc, 24" barrel, calculated ~2825fps

I was being conservative w/ my shot count due to deer season around the corner. My 200yd shots coincide w/ my 100yd shots. The one target shows some drop but not anywhere near what the charts say it should be. Why or how am I shooting so flat? The wind deflection seems relatively consistent w/ perceived wind and chart readings.
Attached Thumbnails - Click to View Larger
200yd shooting in 100yd hole?-280.jpeg  
Reply With Quote
  •   #2  
    Unread 10-26-2013, 01:18 AM
    Platinum Member
     
    Join Date: Oct 2012
    Posts: 1,277
    Re: 200yd shooting in 100yd hole?

    lets try this
    Attached Thumbnails - Click to View Larger
    200yd shooting in 100yd hole?-rem.jpeg  
    Reply With Quote

      #3  
    Unread 10-26-2013, 08:31 AM
    Platinum Member
     
    Join Date: Jan 2008
    Location: Northeast
    Posts: 3,410
    Re: 200yd shooting in 100yd hole?

    Some questions.

    How high above the bore line is your scope mounted? The higher, the flatter at 200 yards for POI.

    Have you done a box test with your scope, or a 100 yard check for POI change/tall target test of turret adjustmentor BDC crosshair at 100 yards and confirm?

    Scope parallax adjusted properly?

    Did you use the exact same rest at 100 and 200 yards?

    Is your visual focus when shooting on the "crosshair only" for both ranges?

    What was the bore's condition at the start of the test, clean, fouled, how many shots?

    Is your barrel free floated? Cooled between shots.

    When I have experienced this effect over the years, it has usually been one or more of the above. IMO
    __________________

    "Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt
    Reply With Quote
      #4  
    Unread 10-26-2013, 10:07 AM
    Platinum Member
     
    Join Date: Apr 2012
    Location: California Central Coast
    Posts: 3,094
    Re: 200yd shooting in 100yd hole?

    Don't fight it. Go hunting and be confident.

    Really.

    But yes it's a scope height issue but obviously not a bad one.
    __________________
    Fred Seaman - NRA Life Member
    “Ask, Listen, Learn, Grow”
    "Quit worrying about the little things, good luck and god speed"
    Reply With Quote
      #5  
    Unread 10-26-2013, 11:26 AM
    Platinum Member
     
    Join Date: Oct 2012
    Posts: 1,277
    Re: 200yd shooting in 100yd hole?

    Scope is a 42mm on low mounts. It's about as close to the barrel as you can get. It's a light varmint barrel so a 5shot string shouldn't effect much. The 4shot one hole was shot one 2dif days. 100 then 200.

    I then tried to see if I could duplicate my results. I basically did considering the wind and mirage.
    Reply With Quote
      #6  
    Unread 10-26-2013, 11:31 AM
    Platinum Member
     
    Join Date: Oct 2012
    Posts: 1,277
    Re: 200yd shooting in 100yd hole?

    Free floated
    Fouled bore
    Same rest
    Parallax adjusted

    When I shot lighter loads it followed suit, but the hotter load shot dramatically flatter.
    Reply With Quote
      #7  
    Unread 10-26-2013, 04:31 PM
    Bronze Member
     
    Join Date: Dec 2008
    Location: 62966
    Posts: 99
    Re: 200yd shooting in 100yd hole?

    What do you have the rifle zeroed at? It is possible the trajectory is on the rise at 100 yards and on the fall at 200 yards and they happen to be at the same height above line of sight.
    For instance on my .22 rifle I zero it at 25 yards and it will also be zeroed at 75 yards and about 3/4" high at 50 yards.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes



    All times are GMT -5. The time now is 05:24 PM.


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