When you blokes are all done with measuring and sorting, if you still can't get those JSB's to shoot I would be happy to take them off your hands,lol
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Well, that's part of my concern.....what if my barrel only like 5.54 pellets. They are hardly common. I do have a FX Impact on order, but the barrels come from the same factory so I may have the same problem."Strikey"When you blokes are all done with measuring and sorting, if you still can't get those JSB's to shoot I would be happy to take them off your hands,lol
Hi Chris,"cjb"Nice work Trent! Pretty good quality control from JSB. Seems odd that neither our rifles shoot them well. I'd love to see some groups with the different head sizes if you get a chance. I'll order a pellet gauge as well just for interest and have a bit of a try myself.
Thanks mate,
Chris in Oz
Thanks Harry,"Yrrah"Being an engineer I presume you have measured the ID of the breech end of the ST barrel.
What does it measure?
There is nothing to be gained with PCPs by using pellets with skirts bigger than will stay put when you tip the muzzle down.
H&N do make Baracudas in 5.53 and I think in 5.54mm. But don't hold your breath waiting for Alcock and Pierce or whoever to import the extreme sizes.
Could I suggest you drop the power back to 850 no higher than 880 fps as a start with the JSBs and repeat the 50 m shoot in good air.
I presume you are using wind flags/indicators, at least 3 to 5, over the 50 m, and are giving the nearest-to-you ones a little more bias than those closer to the target; but try to wait for them to hang the same for each shot.
And keep the barrel CLEAN. Baracudas are dirty so if you are mixing pellet types, perhaps clean before going to the JSBs.
In BR competition we don't expect barrels to last more than 50 or so shots before cleaning.
Kind regards, Harry.