SENECA/Sam Yang 909 .45

The single tube 909S has more power potential than the twin tube model as the tube is larger diameter allowing for more space around the valve and a heavier hammer. 909S and 909 are very accurate rifles and respond well to power increases. The following is a typical power tune (909S) for hunting designed to give three powerful shots and a less powerful follow up shot. These velocity tests were performed using round ball ammo off one 3000 psi fill, muzzle 15 feet from the chronograph. The power tune consists of all new or modified internals, full trigger job, ream leade as needed (newer models), and unbreakable cocking handle.

Sam Yang 909 Single Tube

Factory FPS 800 791 778 762

Power Tuned FPS 896 919 891 850

Power Tune price: $300 plus shipping with insurance.

Sam Yang 909 twin tube

Less power than the 909S, but still a beast. Tests performed with round ball ammo from a 3000 psi fill.

Factory FPS 628 646 653 651 646 641 630

Power Tuned FPS 830 843 836 823 801

Power Tune price: $300 plus shipping with insurance.

Sam Yang 909 twin 500cc

Factory w/ round ball 760 763 761 756 747 741 729 719

Power Tuned 898 921 895 856 801

Power Tune price: $300 plus shipping with insurance.