Bought a near mint slightly used .22 cal SMK19 a while ago. Same as the Crosman Quest.
A 12 fpe version, fitted a Quest spring, preloaded it so it could still be closed safely without a spring compressor, 16.3 fpe with H&N Hollow Points.
Am waiting for a custom spring and new tophat and spring guide, should be 14 fpe with far less recoil compared to the Quest spring.
Also fitted a GRT III trigger yesterday, a huge improvement.
Am very happy with this rifle, the first springer I ever tweaked.