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Clays Internat'l power

Discussion in 'Shooting Related Threads' started by RAD, Sep 26, 2009.

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  1. RAD

    RAD Member

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    Feb 23, 2006
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    Clays Internat

    Just checked Clays Internat'l power,19.8gr.,windjamer wad,winchester primer,sts hull,1 1/8 oz. shot.Book says 20.1gr. should be 1145 fps these all checked out over 1320 fps.Is the book wrong or me.
     
  2. chipking

    chipking TS Member

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    There is something very wrong somewhere. I have loaded almost exactly that load (19.7 gr)with Blueduster and DRRF8 wads and they chrono ~1130 to ~1160 fps depending on the wad. I would strongly recommend that you don't fire any more of these loads until you figure out what is happening.

    1. Have you fired a factory load through the chrono to see how it reads.

    2.Are you sure you have International Clays and not Clays. That would be a over pressure load with Clays but based on Hodgdons data it should produce a velocity similar to what you have.

    Good Luck --- Chip King ---
     
  3. fssberson

    fssberson Active Member

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    Nothing wrong with the load. What type of hull are you using? A straight wall hull will get you your results. A AA or Remington hull @ 19.7 or 20.0 grains of International, AA primer, Blue duster 1 1/8 wad will = about 1250 to 1300 ft./sec. Maybe a little faster. Important to identify your hull and weigh your powder drop. The chronograph. Fred
     
  4. Paladin

    Paladin Well-Known Member

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    A full choke will chrono 40 fps faster than a cylinder choke with the same load.
     
  5. hmb

    hmb Well-Known Member

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    That is what the book says. You must be doing something wrong. Maybe your cronograph needs to be calibrated. HMB
     
  6. shrek

    shrek Active Member

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    Is your powder scale working correctly?

    And as mentioned above try a factory load through the chrono and see how it compares.
     
  7. Carol Lister

    Carol Lister TS Member

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    Clays Internat

    You'd be surprised how quickly pressures/ velocities can stack up when seemingly little things are different from the baseline load. Add .010" or .020' to the standard crimp depth of .050" and increase the wad pressure a bit and both pressure and velocity will climb.

    Lister
     
  8. hmb

    hmb Well-Known Member

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    I don't think it would climb over 175 fps. HMB
     
  9. fssberson

    fssberson Active Member

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    RAD: We need more information to help you. You are not only dealing with feet per second But also foot pounds of striking power. When you start dropping below 1,100 ft./sec. AND move back in yardage [27] and you don't take the target really quick, you may not have enough striking power to break a target. It takes 2 ft. lbs. of shot pressure to break a target. Under the conditions that I listed, and if you ride targets out you may have a lot of dust... no pieces. 19.5 to 20.0 grains of International in a AA or Remington hull, 1 1/8 load of shot, Winchester or Cheditte primer [or Remington or Federal], Figure 8, blue duster, or spolar wad [etc.], should give you a really good load if properly crimped... Fred
     
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