I’ve been able to tame my MRD’s miraculously, lol. The two labeled fliers was me being over anxious. These groups at 50 are way way different than they were when I first started using them at the start of the year. 
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First Time Sorting Pellets By Weight
- Thread starter MikeAllen
- Start date
I’ve sorted by both head size and weight to .1g you will obtain at least 10 separate groups of pellets with the lowest and highest weights having multiple weights because who needs more containers for a few odd pellets. The odd pellets are plinking or chrony pellets. The main batches are well screened, consistent pellets that are as good as they can be.
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Time is right. To accumulate enough of one group by weight, and then sort for head size and perhaps defects too is time consuming. I also don’t compete but credit the folks that do go to the trouble to try and find perfection.
I’m also curios how many dies per size that JSB (and other) use in production. Makes me wonder about the PB industry when they sell “MATCH” ammo what they actually do. Is it separate machinery, sorted components, different operators... ? Wondering, since FX specifies only one die for their run, do they have a clause in a contract that says JSB can’t market pellets that come from one die. Wonder how consistent FX pellets are, having come from one die.
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isn’t shooting all about consistency and repetition? From the way the gun is handled, the breathing, sight picture, trigger squeeze, etc? Why wouldn’t one want consistent Ammo?
Then there the confidence thing. If in the back of your mind you can honestly tell yourself you’ve done everything you possibly could to make range day your best, there’s something to be said about that. When I drove home the long drive from RMAC this past year I knew I did everything I could except one very important thing- shoot more in windy conditions. I had no questioning thoughts on my ammo, my equipment, preparation, none whatsoever. It was my first competitive event, and I knew going in that class was in session, and the wind just “blew me away”, lol.
If you feel sorting Ammo will help your groupings, then do it. If not, you’ll always wonder and create doubt
Then there the confidence thing. If in the back of your mind you can honestly tell yourself you’ve done everything you possibly could to make range day your best, there’s something to be said about that. When I drove home the long drive from RMAC this past year I knew I did everything I could except one very important thing- shoot more in windy conditions. I had no questioning thoughts on my ammo, my equipment, preparation, none whatsoever. It was my first competitive event, and I knew going in that class was in session, and the wind just “blew me away”, lol.
If you feel sorting Ammo will help your groupings, then do it. If not, you’ll always wonder and create doubt
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I strongly believe that diameter is more critical than weight. I make muzzle loading projectiles for a 3-inch rifled cannon. They are rough cast from pure lead and I turn them on a lathe to 2.982" +/- 0.001" diameter. Yeah, if the diameter is smaller or larger than that minuscule tolerance, accuracy of the cannon noticeably degrades. OTOH the target weight for these big slugs is 2.700 KG +/- 50 grams or IOW almost +/-2% weight tolerance compared with =/-0.03% for diameter. The much larger weight variation has no noticeable effect on accuracy within that 2% range.
I know this is comparing blueberries to watermelons but I think the principal holds for airguns.
I have diameter sorted a tin of 0.177 7.0gr Crosman domed and 0.22 14.3gr Crosman domed via pelletgage. I intend to sub-sort each diameter group by weight and do a weight vs diameter test of my hypothesis.
I know this is comparing blueberries to watermelons but I think the principal holds for airguns.
I have diameter sorted a tin of 0.177 7.0gr Crosman domed and 0.22 14.3gr Crosman domed via pelletgage. I intend to sub-sort each diameter group by weight and do a weight vs diameter test of my hypothesis.
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The good news is your entire batch above is within 1% of median weight. Bad news is you're gonna burn trhough a LOT of air doing those tests. May want to sub-sort the most accurate weight by head diameter and see how much effect it has.
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I just got a PelletGage and so far have found JSB and FX .25 caliber 33.95 grain pellets to have very little - almost no - variation in head size. I'm not shooting competition (so far) just trying to tighten things up a bit and don't mind taking the time to measure, weigh, sort, etc. The process continues.
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Keep your pellets separate and sight in with each weight. Should be to far off, then you can still shoot your pellets.
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There is a proof on the forum which explains what is tested by rolling pellets using the YRRAH method. The thread linked below quantifies what the tests showed when tested. There is no doubt that rolling them sorts on three different criteria. That said, I am NOT LOOKING FOR A FIGHT. Just ignore this if you are getting pissed by seeing it.
www.airgunnation.com
Accuracy of Pellet Rolling
Geometry of Pellet Rolling Thread In that thread I offered a proof of the geometry of pellet rolling showing what it differentiates upon. To wit: Head Radius, Skirt Radius, and distance between the two. Those are the only three things which the proof shows. Rolling does not give us...
www.airgunnation.com Upvote 0
Never looking for a fight! I appreciate all feedback and replies! Now I’ll go read the pellet rolling post.There is a proof on the forum which explains what is tested by rolling pellets using the YRRAH method. The thread linked below quantifies what the tests showed when tested. There is no doubt that rolling them sorts on three different criteria. That said, I am NOT LOOKING FOR A FIGHT. Just ignore this if you are getting pissed by seeing it.
Accuracy of Pellet Rolling
Geometry of Pellet Rolling Thread In that thread I offered a proof of the geometry of pellet rolling showing what it differentiates upon. To wit: Head Radius, Skirt Radius, and distance between the two. Those are the only three things which the proof shows. Rolling does not give us...
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Hello.
Weighing the pellets is a quick and easy test. Same weight equals same volume, but unfortunately not the same shape.
And this is the problem. A mechanical imbalance or an aerodynamic asymmetry can be present with the same weight.
Weighing only slightly improves the accuracy and flyers are still possible.
My test set-up / BR25 / Walther LP400 / 7.5Joule / JSB Express
My targets / Pellethead asymmetrical
My targets / Pellethead symmetrical
My pellets / head asymmetrical
My pellets / head symmetrical
NoLimits
Weighing the pellets is a quick and easy test. Same weight equals same volume, but unfortunately not the same shape.
And this is the problem. A mechanical imbalance or an aerodynamic asymmetry can be present with the same weight.
Weighing only slightly improves the accuracy and flyers are still possible.
My test set-up / BR25 / Walther LP400 / 7.5Joule / JSB Express
My targets / Pellethead asymmetrical
My targets / Pellethead symmetrical
My pellets / head asymmetrical
My pellets / head symmetrical
NoLimitsUpvote 0
Here is a 20fpe customer gun at 25m indoors from last week. 25 shot groups with pellets straight from the tin. Incidentally, these are NOT my best pellets. One group is with shrouded barrel, one is unshrouded. The partly visible ring on these N50 is .315”….same as the 25m target 9 ring.
Mike
Mike
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Wow Im amazed (in a good way) how some inspect the pellets before using them!!!!! I just buy them and shoot them of course I'm not a competitive shooter just some old guy happy with putting a projectile within a one inch circle..Hello.
Weighing the pellets is a quick and easy test. Same weight equals same volume, but unfortunately not the same shape.
And this is the problem. A mechanical imbalance or an aerodynamic asymmetry can be present with the same weight.
Weighing only slightly improves the accuracy and flyers are still possible.
My test set-up / BR25 / Walther LP400 / 7.5Joule / JSB Express
View attachment 301756
My targets / Pellethead asymmetrical
View attachment 301758
My targets / Pellethead symmetrical
View attachment 301762
My pellets / head asymmetrical
View attachment 301764
My pellets / head symmetrical
View attachment 301765
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Absolutely totally agree. Prepping for EBR, I sorted by both weight and head size. Weight made no difference but head size did. 5.54/5.55 gave me POI out to the 5 ring. 5.52/5.53 gave me 24 out of 25 shots in the 9 ring or better in the 75 yard qualifiers.
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I contacted you a while back for the "pellet chuck or holder tube" but you didn't had a .22 or .25 available. Did you started making those larger OD?...A mechanical imbalance or an aerodynamic asymmetry ...
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