Sorting pellets by viewing

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NoLimits

NoLimits

Member
Jan 12, 2021
20
18
Germany, Germany
Hallo,

I live in Germany. Sorry I do not speak English well. Reading works better. That's why I like to read in this forum from time to time.

I shoot air rifle and air pistol in .177 caliber for many years. I like to share my experience and knowledge that some European sport and benchrest shooters need.

I have tested a lot and compared many factors, but at some point I asked myself the question:

What is it that makes a pellet good ?

Sorting the pellets by weighing, measuring, rolling or washing and lubricating only makes sense for pellets in the lower price range.

As an example: There you weigh all the pellets and still have flyers right and left. So it can not be the weight.

A few years ago I built a test device to look at the pellets. But the most important thing is to look at the pellets while they are moving !



I would like to write this article step by step. First of all, today I will show you good and bad holes on the back of the pellet.



What can you see? Nothing.

Coal Starter Domed 1-5.1628259561.jpg


What can you see now?

Coal Starter Domed 1-3.1628259654.gif


Here are some more examples of good and bad holes.

Coal WP Field 1-3.1628259905.gif
Crossman Field Target 1-3.1628259905.gif
HN Baracuda Match 1-3.1628259905.gif
HN Field Target Trophy 1-3.1628259905.gif
JSB Field Target Exact 1-3.1628259905.gif
RWS Super Field 1-3.1628259905.gif


Thanks, that's it for today.
NoLimits
 
the worst thing youll run i to that will cause a flier for sure is a pellet thats out of spec diameter .. i bet all those 'sorters' out there completely miss that and its common, ive found under-size to be the most common while slugging and prepping some of my barrels ... so yeah, weight may or may not tell on that ..rolling, not .. wasting your time if you dont get the skinny ones at least ...
 
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the worst thing youll run i to that will cause a flier for sure is a pellet thats out of spec diameter .. i bet all those 'sorters' out there completely miss that and its common, ive found under-size to be the most common while slugging and prepping some of my barrels ... so yeah, weight may or may not tell on that ..rolling, not .. wasting your time if you dont get the skinny ones at least ...
Click to expand...

I do not want to hijack this man's thread because his machine is very interesting and I want to know more about it.

I believe you do get the "skinny" ones. I think you are saying that rolling won't sort the smaller diameter ones out if the head to skirt ration is the same. I think I have managed to make a proof that shows rolling WILL sort those out (for the most part). I dropped that proof at the end of part 5 earlier this evening. I am still waiting for better minds to review the proof but I think it is a good proof.
 
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Nolimits, I think your device is very interesting and well designed for testing exactly the inner skirt eccentricity for pellets, just because the outer skirt of the pellet looks concentric really doesn’t matter that much! I don’t think weight and head diameter or lubricant play a major role in keeping pellets stable? I believe it’s velocity and eccentricity that plays the biggest role?
 
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Hello,
thank you for your interest.
Today I would like to go a little step further.
(I will show you my test machine a little later. Have a little patience.)

First, I would like to show you a real example of a pellet with a slanted rear end. This does not happen often, but even with premium pellets this defect can be slightly present.

HN Baracuda 2650.1628346213.gif


The rear end is slanted and wobbles.

Pellet non-concentric hollow base 2.1628346349.jpg


Pellet oblicque buttoks 2.1628346367.jpg




In my other test machine, the pellet is skewed and the axle wobbles.

Pellet wobbling axis 2.1628346604.jpg


HN Field Target Trophy 1-2.1628346675.gif


JSB Field Target Exact 1-2.1628346691.gif


Finally, an illustration to think forward and backward.

Krone Heck 4.1628346972.jpg




Now it's weekend, I'll get back to you soon.

NoLimits
 
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Hello,
today I make the last step. I'll show you the most common mistake that can cause poorer precision or a flyer with pellets.
If the head of the pellet is bad, the hit is also bad. More precisely, it is the eccentricity or the concentricity of the pellet head.



A good pellet.

20210816144042.1629134853.gif




A bad pellet. The head is not centric to the two cones.

20210816143623.1629135011.gif




Round Head Pellet eccentricity 1.1629135196.gif




Round Head Pellet eccentricity 2.1629135235.gif




As an example, an electronic hit record of many tests I have done.

accuracy with flyer 8,9mm.1629135576.jpg


I wish all those who weigh, measure, roll, wash, and lubricate pellets much success. The fliers will not disappear.

NoLimits
 
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@bandg
I agree that sometimes weighing still makes sense. Same weight means same volume. Different weight means different volume. But how displaced the shape of the bead is (given the same weight) cannot be determined by weight, only by symmetry.

@steve123
There is a little problem there. My machine is for .177 cal (4.50mm). This caliber is the most shot in Germany and Internationally (Olympic disciplines). I have never made a jig for the flat cone of the JSB Jumbo Monster. I would have to make and test a case for cal. 22 Monster first, but that would not be a problem. 

Shipping time and United States customs should be the bigger problem until the Benchrest event on Aug 26.



Mantel Test.1629208131.jpg


Maybe praying will help now.

NoLimits
 
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are you going to show us or describe what to look for in AA and JSB pellets ?

This defect is not present in all makes. AA and JSB pellets rarely have this defect.
That's it for today. Next time I will show you what to look for in AA and JSB pellets to achieve better precision or to avoid fliers.

NoLimits
Click to expand...
 
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