Interesting Pellet Skirt Result

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OldSpook

OldSpook

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Apr 25, 2021
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Same day, same pellet, same tin. Aggregate Targets

skirt1.1635877233.jpg


skirt2.1635877313.jpg



 
Interesting results! Less vertical stringing in the “formed skirt” target, as well as an apparently negligible change in horizontal stringing despite considerably more challenging wind conditions.

But I think this is where OldCrow would step in to point out the setup isn’t accurate enough to discern the differences associated with the pellets.
 
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Interesting results! Less vertical stringing in the “formed skirt” target, as well as an apparently negligible change in horizontal stringing despite considerably more challenging wind conditions.

But I think this is where OldCrow would step in to point out the setup isn’t accurate enough to discern the differences associated with the pellets.
Click to expand...

You might be right about that. =)

I shot this months ago but decided not to put it up on sight because the groups were so big at only 40 yards. Today I found it on the desktop. I thought, "interesting!, I should post this."


 
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Have been TRUING skirts for roundness for years now and shared my method & tools on numerous AG forums.

DSCF0548.1636342174.JPG




Not a flaring tool ... Skirt roundness truing only.



YES INDEED, A round pellet loads with less YAW error and fly straighter.
Click to expand...

You showed me that a couple of times. I tried to print something on a 3d printer that would be "universal" ... I have not given up but I have put that idea on a back burner. Your tool on the other hand looks like it works just fine. You will remember the first time I saw it I said, "Looks like a solution looking for a problem." I guess you can't be right all the time, eh? ;)

I wonder if one could cast those in a ceramic like they used to do with insulators. Something is going to click if I see that picture often enough.
 
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Sadly each individual pellet type / weight / caliber has a different skirt tail I.D. angle. When I made @ 6 different ones for the pellets and calibers currently being shot, it became an exercise in bumping the compound on the lathe a little at a time making a cut then trial fitting a specific pellet on it. Once they matched made a final tool for THAT PELLET and on it went many more time to get each right.



IMO no generic tool with some average angle with do this correctly. Either the angles too shallow and contact is made too deep, or angle too steep and you end up flaring the skirt.

Thus it makes such a tool very specific in shape to do the task with utmost uniformity.



Scott S
 
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Motorhead,

I've seen your skirt truer several times on various forums. I don't have the equipment or skills to make one myself. But if you were to 3D scan a few of yours or even a "blank" which can then be filed for use with a particular pellet, I would order a 3D print. 3D scanning can in theory be done with a cell phone, but I don't know how to convert the output to the data needed to 3D print. Maybe one of the 3D printing experts, e.g., Insanity, on the forums can help with that. Here is a link to info on 3D scanning with a cell phone:

https://www.sculpteo.com/en/3d-learning-hub/best-articles-about-3d-printing/3d-scan-smartphone/
 
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Sadly each individual pellet type / weight / caliber has a different skirt tail I.D. angle. When I made @ 6 different ones for the pellets and calibers currently being shot, it became an exercise in bumping the compound on the lathe a little at a time making a cut then trial fitting a specific pellet on it. Once they matched made a final tool for THAT PELLET and on it went many more time to get each right.



IMO no generic tool with some average angle with do this correctly. Either the angles too shallow and contact is made too deep, or angle too steep and you end up flaring the skirt.

Thus it makes such a tool very specific in shape to do the task with utmost uniformity.



Scott S
Click to expand...

You know Scott, the idea of casting that tool in a ceramic really isn't that far fetched. 

I just re-read this thread and thought I would comment further on the tool and casting it in some medium.

If you took your tool and trued up a pellet perfectly you could use it to make a mold and cast a perfect copy of the tool in ceramic. You could make five hundred of them in a day and have them fired by the next day. Really that idea MIGHT work. The price of the individual tool would go down dramatically and that process would make it relatively easy to create specific tools for specific pellets. You might find a market for it in the BR and FT communities. 


 
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I bought the Lotte Joker jig and did the inspections using Air Arms 10.3 grain that shoot BR and FT well in my .177 Pulsar. In my first efforts with about 100 pellets, I did not see a noticeable difference. Later this spring I will be working on various pellet sorting / modification ideas and will be using it again to see if the pellet concentricity it is an important variable.
 
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Have been TRUING skirts for roundness for years now and shared my method & tools on numerous AG forums.

DSCF0548.1636342174.JPG
DSCF0549.1636342195.JPG
DSCF0551.1636342216.JPG




Not a flaring tool ... Skirt roundness truing only.



YES INDEED, A round pellet loads with less YAW error and fly straighter.
Click to expand...

WHY can’t we pay someone 25 bucks for this tool and get a group order in for 100 of them

a job shop as they are called can make them for less than 8 bucks apiece for 100 I bet

uo in Canada or I would get them done

I would buy 4 of them for 100 bucks if make perfectly

motorhead thoughts


 
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