I was doing some chrony testing with my Disco with JSB 10.34 grain domed pellets from a 1900 PSI fill down to about 1650 PSI. The first shot was 699 FPS, the next was 775 which was the highest then dropped down to 725 FPS range for the rest of the shots. Correct me if I am wrong, but these initial numbers seems a bit low for the 10 shots. I know the 22 cal version easily achieves higher velocity with heavier pellets in the 23 FPE range which leads me to think that if they both share the same valve that there is something wrong internally such as corrosion in the valve that is building up in the transfer port or sticky valve, weak hammer spring, and/or bad o rings. The rifle has only been modded with the 3 screw trigger mod.
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