Ladder Test

Discussion in 'Reloading' started by devildoc, Apr 13, 2006.

  1. devildoc

    devildoc Well-Known Member

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    [image]http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=70860019&imageID=653831503&MyToken=1bb012e5-80db-4fda-b059-ff0cc15ece3e[/image]

    Grains Velocity
    1.) 24.5 3142
    2.) 24.7 3196
    3.) 24.9 3176
    4.) 25.1 3207
    5.) 25.3 3284
    6.) 25.5 3270
    7.) 25.7 3311
    8.) 25.9 3225
    9.) 26.1 3396
    10.)26.3 3407
    11.)26.5 3415

    Shot at 200 yds., powder=benchmark 24.5-26.5 grains, .2 gr increments (nosler manual) bullet=50gr. nosler bal. tip.

    Ok I think this is pretty much a no-brainer, gotta be the #5 load, right?
     
  2. devildoc

    devildoc Well-Known Member

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    darn it! how do I get the image to show up?
     

  3. devildoc

    devildoc Well-Known Member

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    [image]http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=70860019&imageID=653831503&MyToken=5cf51582-313e-4796-bb61-ab307b141e64[/image]
     
  4. HoytemanPA

    HoytemanPA Well-Known Member

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    Here you go.

    [​IMG]

    When you can see the picture, whereever it is on the net. Right click on it, click properties, highlight the http:whatever making sure it says .jpg at the end. Hit image as you did under the Instant UBB code, hit paste, and there you have it.
     
  5. devildoc

    devildoc Well-Known Member

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    Thanks Hoyteman
     
  6. devildoc

    devildoc Well-Known Member

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    by the way, #1 was my sighter and it was about 8" directly above #10, so I adjusted 4 MOA down. Which Puts it about a half inch below #10 as I see it. Also, I'm pretty sure I pulled #8 a little right. I was using a Pact model 1, chrono and a CZ 527 american .223 rem.
     
  7. royinidaho

    royinidaho Writers Guild

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    [ QUOTE ]
    gotta be the #5 load, right?

    [/ QUOTE ]

    Maybe not. Those three shots are grouped nicely but the velocities are all over the place. It may well be that those three powder weights shoot well together at 200 yds but as distance increased out towards maximum for the 223 the velocity variation will string them vertically.

    Also 3284 isn't much velocity w/the 50gr in a 223. Why not run the ladder test up scale just a little more.

    If your satisfied with the 3284 velocity you may wish to consider loading 3 @ 25.2, 3 @ 25.3 and 3 @ 25.4 and shoot three groups of three then overlay the targets and see how it looks. That may well show you some additional things.

    Just tho't I'd add my 0.02$

    Looks like you have a shooter there.

    Good luck and good shootin'
     
  8. devildoc

    devildoc Well-Known Member

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    I don't really care about velocity that much, 3300 is plenty to make a gopher goosh, I just want to make bugholes as far out as I can. If that load won't get it done and you see somethin' in that shot string more promising, or have any other advice to give, please pipe up.
     
  9. devildoc

    devildoc Well-Known Member

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    If velocity is so important, does that mean that 10 is best? Sinc 9, 10 and 11 have only a 19fps spread, and 1 moa spread in windage and about 1/2 moa in elevation?

    I thought I saw a pattern with 1-3 horizontal stringing, 4-6 a tight node, 7-9 diagonal stringing, 10-11 horizontal stringing, with a likely node .5 gr above #11.
    Am I missing the boat?
     
  10. BountyHunter

    BountyHunter Writers Guild

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    test loads 4, 5 and 6 to confirm repeatable groups and chrono results.

    Look for low SD and ES.

    Tweak seating depth last up and down.

    You did not mention the accuracy of your charges weight. beam or electronic Scale, thrown with measure or what, but that could effect the ladder if not right on.

    If loading for a magazine gun, always start at max OAL or if single shot start at a hard jam, and that you only have to work in on seating depth.

    BH
     
  11. devildoc

    devildoc Well-Known Member

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    I used a beam scale and trickled each load to right on. Magazine puts COL at about .001" off the lands.
     
  12. abinok

    abinok Writers Guild

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    yep, 25.4 looks good to me, load a few and give it a try
     
  13. DonC

    DonC Member

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    Hey abinok, I was hoping you could email me the info you sent others on the ladder test. I would like to try it out on my .243. My address is gundons@yahoo.com Thanks! DonC
     
  14. abinok

    abinok Writers Guild

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    Email sent... sorry it took so long!