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Help with Longshot and MEC

Discussion in 'Shooting Related Threads' started by OzarkGun, May 5, 2009.

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  1. OzarkGun

    OzarkGun Member

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    I am trying to get a MEC loader to drop between 14.5 and 15.0 grains of Longshot powder. The bushing manual calls for a no. 12A bushing. I kept coming up light so I worked my way up to a 13A bushing but am still short on weight. I will try a no. 14 bushing next. My question is this. There seems to be a substantial variance between the MEC bushing chart and my scales. Is this normal considering that I am trying to get such a light load or is Longshot unpredictable? FYI, the load is for a 28ga.

    Thanks for your help.
    Jack
     
  2. Bob_K

    Bob_K Well-Known Member

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    MEC bushing charts are based on single stage machines. That means the machine is cycled a number of times before you get to the powder drop stage, allowing the powder to settle. Hence, bushing charts tend to be heavier than if the drop is on a progressive machine. The difference is a safe difference: lighter rather than heavier. Further, how the user operates the machine can also drive differences in the drop. That is why a scale is required.
     
  3. shot410ga

    shot410ga Well-Known Member

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    Don't rely on charts. Buy a scale.
     
  4. edthearcher

    edthearcher Member

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    I agree with bob k I had the same problem, so I rely on my electronic scale, to tell me what bushing to use. I also have a mec.
     
  5. OzarkGun

    OzarkGun Member

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    Thanks for the info everyone. I am using an electronic scale to measure the load. I am just not use to this much variation between the MEC chart and the scale. Birddog, I will add a baffle and see if it will even things out once I find the correct bushing.

    Thanks to all.

    Jack
     
  6. hmb

    hmb Well-Known Member

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    Did you know that Longshot is a slow burning flattened ball powder which is 34% nitroglycerin. Be careful. HMB
     
  7. Quack Shot

    Quack Shot Active Member

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    The bushing charts are sometimes WAY off. As long as you find a bushing that drops the desired weight and does so consistently, don't worry if it's not the same as the one in the chart. I've had some vary as much as 5 or 6 bushing sizes for the correct weights from the ones listed in the charts.
     
  8. Hatshooter

    Hatshooter TS Member

    Joined:
    Jan 29, 1998
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    mec bushing chart is less than desired. hodgdon chart is close to accurate if you're using a single stage loader
     
  9. Gross Man

    Gross Man Member

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    I also file or grind out my bushing to get to the proper powder drop. Billy
     
  10. Setterman

    Setterman Well-Known Member

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    I use a #15 and get 14.9 gr of Longshot with that bushing. I assume your loading 28 gauge. I would also recommend going to the new Claybuster AAHS wad as it is shorter than the factory AAHS wad and allows for a better crimp. Weigh everything!
     
  11. mirage1

    mirage1 Member

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    May 16, 2006
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    293
    Hi Jack,
    I am not sure what manual you are refering to when you say it says
    to use a 12A bushing. My hodgdon catalog on page 36 says to use
    a No. 14 bushing for 15.4 grains??? I have been usuing this bushing
    for a couple months now and have found it to be very accurate(+-.20 grains)
    in a mec 650 machine. I also like the powder-quick with great breaks
    in the 28 ga. I hope this helps. Joe
     
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