Load Data


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Old 04-26-2013, 02:54 PM   #1
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Default Load Data

Why is there a variance between load data sheets.

Reloading 9 mm 147 gr jacketed bullets with Winchester WSF propellant.

Hodgdon / Winchester web sits says starting load is 4.0 and max load is 4.4 gr.

Lyman load data sheet says starting load is 3.5 to 4.4.

Shouldn't all load data sheets be the same?



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Old 04-26-2013, 04:25 PM   #2
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They use different test set ups. That's why you start low and work up.



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Old 04-26-2013, 10:39 PM   #3
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Everything is different, different lot numbers, different test barrels/firearm, different bullets, different seating depths, etc.etc.

As above, that's why that have a "Start" charge and a "Max" charge
and why we start low and work up. Load data is NOT a recipe only a guideline, to many variables to be a Recipe.

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Old 04-29-2013, 05:46 PM   #4
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Ok,

Lets say hypothetically, that the only load data I had was the Lyman and started with 3.5 grains.

If I shoot the reloads in my 9 mm pistol all is well but if I then try to shoot them through my 9mm rifle is there not a possibility that there may not be enough energy for the bullet to exit the barrel?

Thanks for the feedback.

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Old 04-29-2013, 05:49 PM   #5
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Quote:
Originally Posted by Curt View Post
Ok,

Lets say hypothetically, that the only load data I had was the Lyman and started with 3.5 grains.

If I shoot the reloads in my 9 mm pistol all is well but if I then try to shoot them through my 9mm rifle is there not a possibility that there may not be enough energy for the bullet to exit the barrel?

Thanks for the feedback.
There will be enough energy to exit the barrel, but quite possibly not enough to cycle the action.
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Old 04-29-2013, 05:58 PM   #6
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The liability issue also rears it's ugly head.

The larger manufacturers don't want you

reloading for some cracked Jiminez or Bersa,

and suing them later.

The holy grail is the lowest weight of powder

which is accurate, and will cycle your gun.



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