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My shell reloadability testing results

Discussion in 'Shooting Related Threads' started by Beretta Young Gun, Feb 1, 2013.

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  1. Beretta Young Gun

    Beretta Young Gun Active Member

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    First id like to say that I'm just reporting the readings off of the chronograph machine. However, after think over all the points of concern in regaurds to the speeds I've decided on my next test, high speed/pressure vs. Low speed/pressure, I'm going to tighten the procedure tolerances to get the most fair and accurate readings by doing the following:

    The loading machine will be used for priming, wad insertion, and crimping only

    All powder and shot amounts will he hand measured using a digital scale calibrated and accurate to .01 grains

    Ill increase the testing subjects from just 1 shell per reload amount to 3 shells per reload amount and ill be taking an average speed reading for that reaload amount.

    I will also be switching to a wad that is specifically designed for the hull I am testing.

    Any other suggestions on how I can improve my testing procedure would be greatly appreciated. Thanks Byg
     
  2. scooterbum

    scooterbum Active Member

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    Why change anything? Your recent deviations are the best that I have ever seen.
     
  3. wolfram

    wolfram Well-Known Member

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    I think what you are doing is very good. The one semi variable out there that you really can't control is the variability of the hulls themselves. Or in otherwords, you might randomly grab a pair of test hulls and one could have imperfections from the manufacturing process and the other is extra resiliant for some reason. The only way to counter this possibility is to repeat the test a few times or run several hulls in each control group. All of that makes for a bunch of extra work and probably won't establish the point any better than what you have been doing.

    Sorry couldn't quite contain my inner engineering geek :)

    Best of luck and I look forward to seeing the results of your next test.
     
  4. Scott Johnson

    Scott Johnson Well-Known Member

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    BYG,
    You have the crowd interested, "turn your dogs loose" thats an old houndsman term for, let the games begin. Scott
     
  5. Avaldes

    Avaldes Well-Known Member

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    Here is a summary of your data before the three plastic Federals:


    [​IMG]


    Now I am adding the Federal data:


    [​IMG]


    And finally all data sets, normalized against the original speed of the shell (1200 ft/sec)


    [​IMG]
     
  6. Hap MecTweaks

    Hap MecTweaks Well-Known Member

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    BYG and Avaldes, good job to both of you guys!

    Hap
     
  7. Ross

    Ross Well-Known Member

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    What Hap Mec Tweaks said. Thanks to you both. Ross Puls
     
  8. StonewallRacing

    StonewallRacing Well-Known Member

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    Great reading when the wind chill here is -20. Thanks for the time you put into this experiment.

    Pretty much proved what I normally do of loading my STS hulls 8-9 times. Always quit when it got to that point.

    SW
     
  9. Beretta Young Gun

    Beretta Young Gun Active Member

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    Avaldes, that's a great looking chart. Thanks so much for puting the data into a chart. I was trying to figure out a way oc charting my data and you hit the nail on the head. Thanks again

    The reason I wanted to tighten the tolerances on my tests was because I was receiving messages from a few members that were concerned/skeptical of my findings. This was just a way of puting there minds at rest.

    Stonewall, your post about the temperature got me to thinking about another variable I could test. Warm vs. Cold. My loading room/garage is a constant 70*. When im testing these shells I actually have the chronograph set up inside the building shooting out of an open window out into an open field.

    Another variable that i just thought of ws tge fact that these shells are not subjected to the normal vibrations of transporting shells to and from a shoot. They come directly off the loader, pic taken, fired and pic taken all in less than 3 minutes. The shells don't have time to "settle" and the powder doesn't have time to "migrate" around the wad. This could be the explanation for the extreme consistancy I'm seeing in my test results.

    THANKS AGAIN TO ALL. STAY TUNED FOR THE NEXT ROUND OF DATA. BYG
     
  10. scooterbum

    scooterbum Active Member

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    The powder migrates around the wad during reloading, not during handling.
     
  11. Dr.Longshot

    Dr.Longshot Banned Banned

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    Red Dot will get you more reloads than a slower burning powder like 800-X The smoothie hulls burn off fast, that is the tube seperates and shoots off, The ribbed hull lasts a little longer.

    Promo will get you the same results as Red Dot.

    BYG how many shooters showed up at Charlies last night 2/1/13


    Gary Bryant
    Dr.longshot
     
  12. himark

    himark Well-Known Member

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    Awesome Chart!!!! This is some great data and when it is all compiled it truely would be nice if the moderator would merge all the threads into one and keep it as a sticky.
     
  13. himark

    himark Well-Known Member

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    Wow after further review of your chart why would anybody want to shoot papers? seriously, poorest performance of all and least durability.
     
  14. Hap MecTweaks

    Hap MecTweaks Well-Known Member

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    A good while back, Neil Winston, performed the same thing with reloads and found even ugly reloads still performed as intended. I think he stopped at 8 or so?

    Hap
     
  15. Beretta Young Gun

    Beretta Young Gun Active Member

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    Scooterbum, I would have to respectfully disagree that the migration of powder around the wad occurs during the loading. During the entire loading process the shell remains up right with the wad above the powder. The law of gravity dictates that all objects of mass fall towards the ground, they don't rise up. Theoretically powder migration should not occur until the shells are turned upside down or side ways and subjected to vibration, such as, falling off the loader, being boxed up, and transported to and from the field. BYG
     
  16. willing

    willing Member

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    Byg
    As the wad is forced down, could not powder be forced up past the wad by the displaced air??? Just asking. You have been doing a great job, Thanks a lot.

    Bill
     
  17. scooterbum

    scooterbum Active Member

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    BYG,

    Candle your loads, with a bright light.
     
  18. Ross

    Ross Well-Known Member

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    I would tend to think that if powder is being forced UP past the wad that the wad is being pushed down too fast?????? Or a very loose fit????? Sometimes static electricity may cause some "cling". Otherwise I think BYG is correct in his thoughts on gravity doing its job and any migration is the result of handling-transportation-etc. Ross Puls

    PS Thanks for sharing your findings. And to Avaldes for his graph.
     
  19. Avaldes

    Avaldes Well-Known Member

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    I added some more charts, including the Federal hull data. I also put all of the data onto one chart and normalized it against the original shell speed. Each progressive dot shows the speed as a percent (%) of the starting speed. If we say we want to maintain 90% of the original reloading speed, just about every reload meets this until the end. Surprising.
     
  20. Beretta Young Gun

    Beretta Young Gun Active Member

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    Avaldes, nicely formed graph. I just posted my test about high speed/pressure vs. Low speed/pressure. BYG
     
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