G
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What kind and type pellets you using ? That have your best accuracy i want to order some different tins but so many to chose from.
12FPE gun or unrestricted power? if its the latter then almost certainly JSB HEAVIES 10.34g 4.52 head will be the best.
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I have an impact x, just got ahold of a .177 new style choke stx barrel and sleeve (I had the shroud from an old style .22 barrel). It seems to love jsb 10.34 at about 105 bar and very light hammer tuned to deliver them at 920 FPS.
the key is to overpressure the reg (105-110bar) looking for a max speed of about 945, then to back off the hammer spring until you get about 915-920 FPS.
i also use the valve stop but the crown doesn’t have that option so you may need to find that balance between reg and hammer for best harmonics, however 920 FPS should be the end goal regardless of your preferred tuning regime.
the key is to overpressure the reg (105-110bar) looking for a max speed of about 945, then to back off the hammer spring until you get about 915-920 FPS.
i also use the valve stop but the crown doesn’t have that option so you may need to find that balance between reg and hammer for best harmonics, however 920 FPS should be the end goal regardless of your preferred tuning regime.
Upvote 0