JSB JUMBO MONSTER REDESIGNED .22

Forums Pellets, Projectiles, Slugs, & Ammo JSB JUMBO MONSTER REDESIGNED .22

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    Jlacouturec
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    I have seen people talking in different forums about this pellet and apart from the benefits it offers, they also comment that it requires a minimum initial speed to guarantee stability in flight….. ¿is this true? ….. if it is, ¿What is that minimum initial speed to guarantee the stability of the pellet at about 120 meters?

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    PaulB
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    I do not know the minimum. When Claudio Flores used it to win EBR at 100 yards he was running it at 970fps through a LW Polygon barrel.

    It seems that for long range accuracy you have to push it quite hard.

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    Bob_O
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    That's the problem with these heavy-for-caliber pellets. 

    No way would I try to shoot these out of my Crown as I know the velocity would be way low.  With 21gr H&N pellets, I'm already down to 910fps. 

    Besides, I don't like a loopy trajectory.  Sure would be nice if JSB made a 20gr pellet.

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    Yrrah
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    OK,  I am having no trouble shooting them sub half inch at 51 yd even in a little wind. Muzzle velocity 735 fps 30.5 fpe from the old RWS Excalibre/ FXTarantula.

    Have not shot them out to further on targets but may get a chance late this afternoon after work. The Exacalibre won't exceed that power; but it is an exceptional rifle and has an LW barrel from 2000 vintage. 

    Harry.

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    Yrrah
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    Edit repeat deleted. H. 

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    Jlacouturec
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    Yrrah

    OK,  I am having no trouble shooting them sub half inch at 51 yd even in a little wind. Muzzle velocity 735 fps 30.5 fpe from the old RWS Excalibre/ FXTarantula.

    Have not shot them out to further on targets but may get a chance late this afternoon after work. The Exacalibre won't exceed that power; but it is an exceptional rifle and has an LW barrel from 2000 vintage. 

    Harry.

    my wolverine r hp was shooting those 25.4 redesigned @850fps…. i adjusted it and know its shooting them @910fps and know my rifle is more consistent!! will post some groups when i test it!!

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    JeffDodge
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    Jlacouturec

    Yrrah

    OK,  I am having no trouble shooting them sub half inch at 51 yd even in a little wind. Muzzle velocity 735 fps 30.5 fpe from the old RWS Excalibre/ FXTarantula.

    Have not shot them out to further on targets but may get a chance late this afternoon after work. The Exacalibre won't exceed that power; but it is an exceptional rifle and has an LW barrel from 2000 vintage. 

    Harry.

    my wolverine r hp was shooting those 25.4 redesigned @850fps…. i adjusted it and know its shooting them @910fps and know my rifle is more consistent!! will post some groups when i test it!!

    I found similar in going from 860 to 910/20…. but have you tested accuracy out around 100yds?  I'd like to see how they look shooting them with glow paint glue at 240 frames per second.

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    Yrrah
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    Jeff, I haven't had a chance these last days. We are cropping lavender.

    I will try to get some video to 100 yd when I can – and do a report for the lower velocity and therefore spin rate rpm to get an insight into the static stability status.  Regards Harry.

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    Jlacouturec
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    JeffDodge

    Jlacouturec

    Yrrah

    OK,  I am having no trouble shooting them sub half inch at 51 yd even in a little wind. Muzzle velocity 735 fps 30.5 fpe from the old RWS Excalibre/ FXTarantula.

    Have not shot them out to further on targets but may get a chance late this afternoon after work. The Exacalibre won't exceed that power; but it is an exceptional rifle and has an LW barrel from 2000 vintage. 

    Harry.

    my wolverine r hp was shooting those 25.4 redesigned @850fps…. i adjusted it and know its shooting them @910fps and know my rifle is more consistent!! will post some groups when i test it!!

    I found similar in going from 860 to 910/20…. but have you tested accuracy out around 100yds?  I'd like to see how they look shooting them with glow paint glue at 240 frames per second.

    you dont have to glow them, just place a white target and Avoid recording against sunlight,,,,

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    Yrrah
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    You dont have to glow them, just place a white target and Avoid recording against sunlight,,,

    OK.  The light was not good for video today but I went ahead and shot them to 100 yards.  They were fine at 50 yd half inch. By 80 yd they had lost it and at 100 was not pretty – so at the low speed from the Excalibre there was again no joy past 50 yd.

    I'll leave it there but make a new short post showing what the old excalibre did later with 18.1 gr JSBs. … best regards, Harry.

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