Load Development: Ladder Test

Discussion in 'The Ammo & Reloading Forum' started by JLA, Oct 24, 2011.

  1. JLA

    JLA Well-Known Member

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    exactly. The next ladder test development I do will be for my remage im working on and ill leave it hitting dead center and probably use this same posterboard for the test. afterall itll be 6mm holes aside the .30 cal holes and i wont be set to hit 2 right of POA
  2. howlnmad

    howlnmad Well-Known Member

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    Josh,

    What size bullseyes did you use to make up that target?
  3. JLA

    JLA Well-Known Member

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  4. JLA

    JLA Well-Known Member

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    Just prepared another ladder test for my .308. This time lookin for the sweet spot with 168 Hornady AMAX over 2000MR. I took pictures of how I set my ladder tests up to easily keep track of whats in which case. The ones on the far left just off pic are foulers, and the caseheads are primed brass ready to load with the sweet load. Thot this might help with keeping track for those of you guys that have never done a ladder test. The sheet of paper is the number of the round and its corresponding charge. Again, I shoot them from lightest to heavy, FX5 then 1-20.

    Attached Files:

  5. The_Rifleman

    The_Rifleman New Member

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    Here is the last Audette Ladder Test I preformed, I was using a US Model of 1917, Eddystone.
    I loaded-up 10 cartridges, I wanted to get the proper vertical POI for 300 yards, (since my sight graduations on this old rifle are fixed.) I of course wanted an accurate load too.

    Since I have iron sights I wanted to have the smallest target for a precise POA. I can see a 2moa sized target well at any distance I've tried so far, so I used a 6" white piece of card board on top of a brown piece.

    Here is a pic of the ladder test.
    [​IMG]

    The IMR 4064 still had a lot of OOMPH to go, but I stopped at 6 shots since I knew I had the proper POI and my accuracy node was found... I pulled, then loaded-up 3 cartridges with the load specified to test the next day.

    Here is a short video of the ladder test, test.
    Impossible 30-06 Group

    That is the best group I've ever shot with any firearm, scoped or not... Unfortunately, the POI gets higher as opposed to my POA as the distance increases; so that load isn't very useful passed 300 yards.

    Here is a short video of a 400 yard vertical POI test.
    Not Wasting Anymore Bullets

    I do have another 10 shot ladder test loaded to try at 400 yards using Speer 180gr SP bullets. They have a lesser ballistic coefficient and a bit heavier; since I want the load to be a bit slower, and still have some energy.


    ...


    I'd like to add... all those bullets were pulled twice, and the last 3 were pulled 3 times. All the tips were damaged, and it didn't seem to effect accuracy.
  6. JLA

    JLA Well-Known Member

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    Good to have you back rifleman. Where you been?

    And good shootn as always!
  7. rcairflr

    rcairflr Well-Known Member

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    This is a ladder I worked up over the Christmas holidays. Shooting was at 100 yards.

    Attached Files:

  8. The_Rifleman

    The_Rifleman New Member

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    I get tired of arguing and it soured me since it seemed like I couldn't get away from it. But I realize it is prevalent everywhere, so I'm back.

    Thank you!
  9. howlnmad

    howlnmad Well-Known Member

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    Anyone have an opinion on doing a test at 100 yards with a 30/30? I've lost my 200+ range.
  10. woolleyworm

    woolleyworm Active Member

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    Even if all you had was a 50yrd range, you can still get vital info and useable results. 100yrds for a 30/30 is quite alright.
  11. JLA

    JLA Well-Known Member

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    Id say so howln. With a really accurate rifle 100 yd results would be a bit difficult to decipher, but a 3 MOA .30-30 would prolly do OK at 100.

    I did my .44 mag ladder test at 50 yds, then group tested at 100. Developed a 2 MOA .44 mag levergun load that way.
  12. The_Rifleman

    The_Rifleman New Member

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    Yep, you'll probably come up with a target that will look like this.

    [​IMG]

    I did find a good load from it though.
  13. howlnmad

    howlnmad Well-Known Member

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    I plan to use a target like the one Josh uses and then post a picture of it and let you folks decipher it for me. :)
  14. woolleyworm

    woolleyworm Active Member

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    Good Luck Howl'n; just remember to keep it all consistent and take your time. I make one pull of the Boresnake between each shot. Depending on temps, I take between 5 -10 minutes between shots. The colder it is, the faster. I've never taken barrel temps on a load test, but next time out, I've got an IR temp sensor that I'm taking with me and I'll shoot each shot at the same barrel temp.
  15. mgatc

    mgatc New Member

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    Love the target with the graph lines drawn on it. I think it would be interesting to cut each horizontal line of targets out and connect them end to end. This would clearly illustrate the affects of the barrel oscillations and I think it would make the "sweet spot" jump off the page.
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