Have not used Shear Force directly... I fooled around until he was off the market without buying semen... I'm sure semen can still be had, but there are good sons/grandsons out there, readily available from most of the AI studs.
WW/YW for Shear Force himself is not all that tremendous, but he brought calving ease/birth weight, udder structure, marbling, ribeye, tenderness, API/TI to the equation - in the top 5%, and mostly in the top 1-2% for all those traits. Led the breed in registrations for a while, so I'm guessing his offspring may have done OK in the showring, but from a commercial producer's standpoint, he did a lot of things right.
We've used Bettis, Singletary, Long's Shear Pleasure, WS All In W111, CLRS After Shock, all SF sons/grandsons; mostly over commercial Fleckvieh-influenced SimAngus cows, and a few high%SM Dikeman's Sure Bet daughters. With the exception of the Bettis calves, all have been pretty good.