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Hmmm not exactly a power house, eh?JSB KO MK3 .177
* excluded worst five shot group from set of 11*
50y
Cricket II
Bench, bipod, rear bag
Winds 5-8
872fps average
Avg 5 shot group of 10 targets 1.42 MOA (not actively holding for wind)
View attachment 21236
Less wind during this set today and have the KOs moving faster, yesterday’s fps was 828.
The choked barrel is taking its toll for sure. I shot some 10.3gr pellets too, 18.37ft/lbs. I plan on testing expansion at 50y when I get the tune 100%Hmmm not exactly a power house, eh?
Do you think it does better with 10gr pellets?
Did you try those slugs for expansion too at that range?.. I'd be curious!

JSB KO MK3 .177
* excluded worst five shot group from set of 11*
50y
Cricket II
Bench, bipod, rear bag
Winds 8-13 (R to L)
Best 10 average 1.35 MOA
View attachment 21286
Cleaned barrel, thinking that I should get a Dewey rod and polish it.
It’s a 17.7” choked CZ currently the KO‘s are shooting at 872 FPS.Which barrel in your Cricket 2 and at what velocity are you shooting the KO MK3 at 50 yards ?
I would definately give the barrel a polish![]()
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