Career 707 Series .20 .22 .25

These guns come in standard length and carbines. Even the carbine with 16” barrel is capable of pushing pellets to the threshold of maximum velocity for accuracy. My tune decreases velocity extreme spread (ES) and includes some mods for decreased air consumption while not sacrificing any power. Often power averaged over the first 6 shots will actually increase due to less velocity loss on the latter shots. Here are sample actual chrony results with the power wheel set on maximum valve lift unless noted:

.25 Carbine

Factory 35 gr Eun Jin 955 937 902 884 858 833 (ES 122 fps)

Tuned 962 946 931 913 892 871 (ES 90 fps)

Tuned, power wheel reduced 915 896 882 870 856 855 (ES 60 fps)

Factory 43 gr Eun Jin 904 876 859 843 824 804 (avg. fps 852)

Tuned 43 gr Eun Jin 918 904 888 867 849 832 (avg. fps 876)

.25 Long Gun

Factory w/power wheel max 38.5 EJ, 7 shots: Hi 892, Lo 771, Avg. 831, ES 121

Tuned : Hi 943, Lo 875, Avg. 913, ES 67

.22 Carbine

Factory with Eun Jin 28 gr, 6 shots: Hi 929, Lo 793, Avg. 863, ES 135

Tuned: Hi 883, Lo 849, Avg. 870, ES 34

Full Tune includes disassembly, clean, and lube, power and consistency mods, trigger job with contact points stoned, polished, proprietary lube, and adjustment, power wheel increased adjustment mod, all new seals, upgraded spring assisted fill check valve, and chrony tested.

Full Tune $250 plus shipping.

Reseal only: Disassemble, clean, lube, and all new seals,new exhaust valve, and upgraded fill check. $175 plus shipping