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JSB 33.95

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    2D1C
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    I am shocked at the difference in weight of these pellets. I am half way through my first tin of these. 30% are 33.0 gn to 33.7. I’m accepting 33.8- 34.2. (50%)
    20% are 34.3 to 34.8! Seems like one hell of a swing to me. Much greater the what I have seen with the 25.39’s.
    Maybe I have a bad tin? New to these .25’s input always appreciated.
     

    • This topic was modified 3 weeks ago by 2D1C.
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    Your findings could be a very good reason I have found they are not that great in my bobcat or streamline.  I think your on to something.  I think the clock is ticking on my next buy…a scale.  Thanks for point this out!  The 25.39’s are loving my guns, so that is the way I’m going for now.  Gotta get that scale!  sending some positive feedback your way for showing me the light.

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    Thank you FunGun.
    Its been so hot here i really haven’t been able to play with these weight differences on the chrony. Plus I am still learning the gun, have to fit the gun and trigger to me.
    I know already? I really like figuring this out. I did the same thing when I shot trap.

     

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    cant see all the data but if you normalize it do this (34.8-33.0) divided by 34.8 x 100 [%] it is still around 5% plus minus, that not that much variability in weight. even if i divide it by 33 instedad of 34.8.
    chasing your tails guys i think.

    Shoot those weight sorted heaps on their own separately and compare the POI.
    Show us some groups pictures about POI

    Perhaps there is no relationship at all just your gun would not group or the wind is skewing the results or it is the shooter.
    Come on, do not add to the white noise, follow through properly if you are doing some analytical work. finish it properly.
    show us some groups/poi change pictures.

    you need to start ruling factors out, you are not that far from completing one step.

    • This reply was modified 3 weeks ago by sirk.
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    +1 well said. its all about poi and if there is a significant difference

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    Sirk that’s what I do. I sort um and shot um. I am on vaca this week. After I get back from traveling I’m going to see what is any difference the weight makes. What the concern is, 23 pellets short of 1/3rd are light or heavy. Mostly light.
     

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    In the mean time Sirk? Maybe you or steppenwulf can offer some data from your analysis. That would be helpful.
     

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    i just got done shooting half a tin myself, i know something isn’t right with them. had to re zero my scope. my overall thought is they put 26gr in a heavy’s tin by mistake. they are not matching up to the strelok pro data i previously had. but they are shooting closer to the 26grain data then the 33.95 data? has anyone ever gotten a mismatched tin like this? i don’t have any way to measure the weight, only chrony and previouse data. i just recieved these from Pyramid Air.

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    The King Heavies  do look quite different to normal Kings. Visually it’s not hard to see the difference and you can feel the difference in weight. 
    They can only get 300 in the tin compared to 350 normal Kings. 
    Although I shoot them almost 100fps slower ( than normal Kings)from my gun the high bc (.056 in my gun) means they do end up on a similar trajectory. 
    If you post a picture of the pellet we’ll know if it’s a king heavy. 
    Michael

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    The big boy to the right is a .30 jsb 51.5grn , notice the thick barrel style band between The Head and the skirt. That’s how the other MKI 33.95 heavies looked. Or I thought that’s how the looked.

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    They are King Heavies. 
    The photo is a  King Heavy on left normal King on right. 
     

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    Wondering why I had to rezero

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    Sorry for the late reply, I had to go out of town on vaca/family business. However took the AW with. There is something really wrong with these! I shot 5 out of the mag and QUIT.   I didn’t like forcing them through the mag and they were spiraling at the 100 yard target. So Then I put in the SS tray? I was getting blow back from the breach or something. it was LOUD and the the electronics started  beeping continuously. I shut it off restarted it and tried again, same thing. I have new probe O rings. I am going to change out the old one and hope the gun is not damaged. I don’t know what that BEEP BEEP BEEP was and can’t find anything on it. I am going to send theses back to Utah Airguns. Pretty strange!

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    Update…..Talked with Utah Airguns, They had an AW (just sold it) there that wouldn’t shoot these either, They thought they were just to long. They are sending a tin of MK2’s, Asked me to evaluate them. These people are pretty awesome to deal with. I offered to send the tin back and pay the freight for both. Nope they wouldn’t have it.
    I’m betting only two would want the used tin. LOL
     

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    I would like to send this tin to a new shooter. I’ll pay the freight
     

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    Got the JSB .25 MKII’s. I haven’t had a chance to shoot them long range yet. However they drop perfectly into the mag and chamber fine. Chrony showed a low of 746 and a high of 857 so a drop of 100-110 fps from the 25.4’s which seems in line from other things I’ve seen.

    • This reply was modified 1 week ago by 2D1C.
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