new JSB Monsters showing promise in .22 cal

[Gertrude]

In what I have seen among the guys I shoot with, (and the various guns we have shot them in)... they DO seem to like speeds higher than most .22 cal guns are capable of pushing a 25+gr. pellet.

My particular M11 pretty much loves them.
 As does my higher powered "Franken-gun" (22XX based custom), and my "SUPER Tuned" QB/PCP.

 My XS60c shoots them well at shorter distances, but it really does not have enough power to justify putting such a heavy pellet down it's barrel. (It LOVES the JSB 18.13's)

[Hoosier Daddy]

Ron: Do you know off hand the power setting on you XS60C?
Mine is at "Mid Power" and I can visibly see the 15.83 travel to the target at 30 yrds... exactly where I aimed at.

[Gertrude]

Ron: Do you know off hand the power setting on you XS60C?
Mine is at "Mid Power" and I can visibly see the 15.83 travel to the target at 30 yrds... exactly where I aimed at.

To be honest, I do not remember what we tuned ours to. The 2 that we have are not stock rifles by any means. My machinist buddy made a couple of drop blocks for them (similar to a QB bottle conversion). Both of ours are now bottle fed and we only take them up to 1250-1500 psi.
He also did some valve work on them, so again, ours are not a factory stock configuration anymore.

If I go shooting this weekend, Ill try to remember to take it with me and run some strings and grouping.

[Hoosier Daddy]

Pffft.
 Mine is bone stack as delivered from a Mike M. after his tune... so apples to oranges compared to yours.
Thanks anyway!

[skorec]

I`m clueless how the H&N Rabbit magnum are not performing in any analysis I have seen on them..  They are very comparable to a bullet type..
However!!  Does any of the guys here have done a BC analysis of the new JSB Jumbo Monster?   It would be good to look at the results and see at what fps they like to be at...  This is a great topic Jason and thanks for opening it..

Inside  linked video you may see :
1.   BC=0,046
2.   best grouping  for  Monster REDESIGNED is at 960 FPS.
3.   Enough long chocked  polygonal LW barrel with TR = 1:19,5
4.   Groping at 100m sub MOA.

[KnifeMaker]

As to the Rabbit MAgs.(I or II):  PASS

.22 Rabit Mags (I or II) have been pretty horrible for me.  Tested soemthing like 7 or 9 .22 PCP's at various power levels (most are mine..a couple were borrowed) from 12 to 52 foot pounds.

Did find one that did do "ehhh"....but it was good enough to usefully to about 25-30 yards...so use the last of those tins up in that rifle.




Now the "why" that one barrel/rifle shot them well enough to use escapes me....just part of the general "independence" of PCP barrels.  It's not the fastest or the slowest (running about 25 foot pounds...which with these pellets, is pretty much just loafing around in speed)....certainly not the most expensive....and certainly not what I expected.

I would just about that the bbl. is either very lightly choked, or none at all. That, or the rabbits just happen to match the choke. This would be  very typical in bullets in ag barrels.

Knife 

[Ribbonstone]

If there is a choke (it's a Beeman Chief), it's subtle enough that I can't easily detect it.   But in other .22's that I KNOW don't have a choke  ('casue I cut them off several inches and recrowned them) they won't shoot....and in rifles with a known choke, they won't shoot.

But I have noticed, when I test a new air rifle with all the pellets on hand, I sometimes (on a guess...about 1:4 times) get a surprise match up, and it shoots some lonely orphan tin of pellets that haven't shoot with a snot in anything tried in the last decade.

That's pretty much the "life" of those "orphan" pellets....just sitting in the locker, year after year, getting tested here and there as new toys come into the house.  IF they ever do find their moment of glory, there aren't many of them left in the tin by then (and I'll be darn if I'd order more even if they were still made).

[skorec]

They measured  Ballistic coefficient  at 150m by using polygonal barrel at 290m/s  .  The Value is really unbelievable   BC=0,086 .  Accuracy was only  2,2 MOA.

[rsterne]

Yeah, I find that to be a bit hard to believe.... I can't understand them, but I assume they used the drop at 100M and 150M to calculate the BC, since I didn't see a Chrony.... The possible errors include accurately assessing the center of the group locations used to calculate the drop.... the atmospheric conditions and whether they corrected for them.... and the ballistics model they chose to use  (eg. G1, GA, etc.).... To get a BC of 0.086 with an SD of 0.075 requires a Form Factor of less than 1 (actually 0.87).... which is better than most flat based round nosed bullets.... For example .22LR bullets have a form factor of about 1.0 (the BC is pretty much the same as the SD).... Most JSB Exact series pellet have a FF of about 1.5, which means for an SD of 0.075, they should have a BC of about 0.05....

Bob

[Corny]

   My 40fpe Hatsan Galation .22 loves these JSB Redesigned .22 pellets
My Will Piatt tuned .22 Sumatra Carbine loves these pellets. I have those shooting around 890-900fps so not sure FPE I have not figured the FPE out yet. But these are AWESOME in these guns! Too heavy for any other of my other  .22 guns.

Best of Luck Fellas

Could u provide a little more data on how your Galatian was or is tuned with the heavier pellet.
Would like to give them a try.

[skorec]

   My 40fpe Hatsan Galation .22 loves these JSB Redesigned .22 pellets
My Will Piatt tuned .22 Sumatra Carbine loves these pellets. I have those shooting around 890-900fps so not sure FPE I have not figured the FPE out yet. But these are AWESOME in these guns! Too heavy for any other of my other  .22 guns.

Best of Luck Fellas

Could u provide a little more data on how your Galatian was or is tuned with the heavier pellet.
Would like to give them a try.

I am also intersting for tha same . Is It long barrel Galatian ?

[Corny]

   My 40fpe Hatsan Galation .22 loves these JSB Redesigned .22 pellets
My Will Piatt tuned .22 Sumatra Carbine loves these pellets. I have those shooting around 890-900fps so not sure FPE I have not figured the FPE out yet. But these are AWESOME in these guns! Too heavy for any other of my other  .22 guns.

Best of Luck Fellas

Could u provide a little more data on how your Galatian was or is tuned with the heavier pellet.
Would like to give them a try.

I am also intersting for tha same . Is It long barrel Galatian ?

Soon as I get my hands on a tin, I’ll be trying these with Galatian qe.
I’m guesssing it has sufficient power to get them well past 900 FPS.
Just not willing to pay $20 for a tin of 200 from amazon.  About the only place I’ve found them.

[RAJOD]

what rifle were you using and by chance......did you get any chrony numbers ?

John, I didn't set up the chronograph but the B51 is tuned to a pretty modest 27fpe with JSB 18.1gr so we're probably looking at about 30fpe / 730fps for the heavier Monsters.  I had tried the original Monsters everywhere from 20-45fpe (600fps - 900fps) to no avail so the new ones are definitely encouraging.

Good news on the new Monsters.   The old ones shot ok in the AT 44 I had but it had the power.   My other guns I don't see the sense in shooting 25gr.    Unless you can shoot them over 820 fps I would opt for the more accurate flatter shooting JSB 15.9 or 18s.   

[skorec]

   Unless you can shoot them over 820 fps I would opt for the more accurate flatter shooting JSB 15.9 or 18s.

Agree with you absolutely

[rsterne]

IMO they have a place in .22 cal PCPs that are over 40 FPE.... and better at 45-55 FPE.... The 18.1 gr. Heavies are such a great pellet, and they shoot lights out for me at 960 fps.... why would I look for heavier and slower in a 37 FPE gun?.... I had one gun that liked the old Monsters, my B-51 tuned to 50 FPE.... other than that they were mediocre accuracy.... I'm hoping the redesigned ones will be better.... Eventually they will show up in Canada and I will find out....

Bob

[WesBob]

Here they are Bob: https://www.airgunsource.ca/en/jsb-match-diabolo-new-jsb-match-diabolo-beast-jumb.html

[rsterne]

Actually you linked to the 34 gr. Beasts.... but they DO have them now at AirGunSource....

https://www.airgunsource.ca/en/jsb-match-diabolo-redesigned-jsb-monster-22-cal-25.html

They didn't last time I checked, only a couple of week ago.... Guess I need to order !!!

Bob

[WesBob]

Oops my mistake! Glad you found them anyway 😊

[skorec]

Actually you linked to the 34 gr. Beasts.... but they DO have them now at AirGunSource....

https://www.airgunsource.ca/en/jsb-match-diabolo-redesigned-jsb-monster-22-cal-25.html

They didn't last time I checked, only a couple of week ago.... Guess I need to order !!!

Bob

Bob,   What are your results  ?

[nervoustrigger]

My guess is his results are measured in inches...of snow