Mine is accurate with a nice trigger but very heavy and a few things could have been designed better. The pumping gets VERY heavy, very quickly. I pump only 2 for 12 ft lb but even the first pump is pretty heavy. Fifth pump requires very strong chest and arms and I really don't think the valve will hold up if done much. I've pumped to 7 twice and it got 23 ft lb.... way not worth it.
Another issue with a side lever pump set up like this is that the residual air between the pump piston and valve creates quite a bit of force that actually bends the pump tube which has the barrel firmly attached. The more you pump, the more your shot moves left. Underlever pumps do it also but it pushes the shots up so you can calibrate poi with each pump number.
I originally bought mine because I like pumpers and was planning to use it for ft. The side shifting plus effort killed that idea quickly. I think it was the same for
@steve123, who I first met at a match attempting to use one.
My Sharp sidelever pump does not seem to do it... or at least discernably. The piston is much smaller and the heavy barrel is more firmly attached and adds to the strength.
The way they're made, they were also very expensive. The valve is a little finicky to set the stroke on, and the delrin pump slider was a good idea for sliding friction but easy to break if pumped much... read : all have broken that I've seen. I made some oil absorbing bronze sliders for the small number I've repaired, including mine. The manufacturing was moved to the Philippines, I think, but between the expense, problems, and pumping effort... it was doomed from the beginning.
Sooo... mine currently sits by the door for rock squirrels and gophers. Two pumps is very quiet and it takes em down hard. Very reliable and super nice firing cycle with the hammer riding in a Delrin sleeve.
Bob