JSB heavies

In search of the best pellet for full power tuned HW77

After tuning my HW77 by replacing its spring, spring guide, added top head and sleeve… The power seems significantly increase… but as you might aware, the power means nothing if it is not accurate / precise. Now I have chance to try my Tuned HW77 in shooting range to see if the accuracy is the same before tuned.

First of all, this is the accuracy at 27 meters using Crosman premier 7.9 gr , let’s use it as the base or bench mark, BTW the coin is exactly 1 inch diameter

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