JSB .22/20.83 ballistic coefficient and first impressions

[Danman]

I did just that this spring and it was exasperating, lol. I got my Huma gauges and proceeded to drop the reg to 100B and tune-up from there at the same time (18.13gr were 998 to 1098fps @ 160B on mine) 100B was dreadful with Mrds so I tried 125B. Well with that reg pressure the 18.13 were going just over 1000fps on min!!??! Whaaaat!? Mrds were less accurate too, so i dialed up till I got my old Mrd accuracy and 53fpe back:150B is truly the sweet spot on mine. Exact same numbers, more shots per fill.
Previously it could shoot H&N Hornets supersonic on max, now its juuuuust under that so it is a tad weaker but definitely a happier gun. Honestly I have zero desire to shoot an 18.13 outta it (your holdovers on the ground squirrels) Mrds are faaaaar better at distance. I took the S510 to 100Y once as well with the 18s....not great Got 3 starlings this spring in a row off my neighbor's hay wagons (S510), at 40Y away I had held an entire starlings body to the left and 3 shots 3 hits, wind pushes them hard indeed!
With the Jsb lights I thought i had the 2 perfect pellets to run on one pressure but they couldn't handle 960 fps.

The .22/20.83 grain JSB Monster Light does have a bit more power potential than a .22/18.13, and certainly a better BC. This pellet has my stamp of approval for anybody wanting to eke out more performance from their PCP in the 35-42fpe realm.

I reread your initial post here and I think you hit the nail on the head with your Review of these pellets....esp with this statement. Lastly, my Ghost is a fussy slob. I have run EVERYTHING through it (minus AEA, but it despises anything from JTS too) and it only likes Mrds and Mrds deeps. I don't really care, as next year its gonna be a slug gun. Starlings beware!

 

[Franklink]

Just shot this before work.



From the Ghost. Dunno the exact fps but needed 3 mils for 100 yards so probably in the 900-920ish range.

Reg of 160bar, MIN on the power wheel.

The upper right is 1" CTC, bottom right is 1.125" CTC.

It was windy.

Didn't change my opinion of them....theyre still better than .22/18.13, but not as good as a .20/15.89 for wind deflection and therefore long range accuracy.