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.20 Cal JSB Heavy  

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Luckystrike
(@luckystrike)
Joined: 3 years ago
Posts: 55
January 20, 2020 16:05:02  

What do you guys think about the JSB Heavies in .20 cal?  I’ve been shooting the normal JSB .20 cal domes out of my TALONP 12” barrel and it loves them. 


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ribbonstone
(@ribbonstone)
Joined: 3 years ago
Posts: 338
January 20, 2020 17:16:07  

HAve worked in the 5mm's I have at hand (4 of them).

 

Not so much in the only springer....not worse, just not better. 

 

Win in the co2 and two PCP's so long as it is pushed no faster than 920-950fps (which is pretty hot for a 5mm) are working quite well.

 

 


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BigTinBoat
(@bigtinboat)
Joined: 3 years ago
Posts: 129
January 20, 2020 18:34:59  

I have my MRod tuned to shoot them avg 925fps. One hole at 25yds, 1/2" at 50yds.


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Shambozzie
(@shambozzie)
Joined: 3 years ago
Posts: 111
January 25, 2020 09:20:05  
5837233161
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Group shot @ 85 yds with new jsb heavy 15.9 @ 895. One 12 shot mag . Az tunes rapid mk ll .20 cal

Resized 20190608 124115

 


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Pneumatic-Addict
(@pneumatic-addict)
Joined: 12 months ago
Posts: 40
January 30, 2020 14:59:55  

I shoot the heavies in my Leshiy with a 250mm barrel.  It's backed-off to 600-ish fps so the neighbors won't notice.  At the ranges I shoot (13 yd to the pecan tree) the POI change is negligible when using the lighter 13.73's, but the heavies smack a little harder.


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josh3rd
(@josh3rd)
Joined: 3 years ago
Posts: 213
February 1, 2020 23:46:39  

In my rx2 they are horrendous. I would trade them in a minute for some old beeman fts.


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