Just throwing this out there, but HyperCoil sells springs of various lengths and spring rates. It might be a better option than bouncing off your bump stops all the time with the cut springs.. Not sure how much you're wanting to cut. You can order a higher spring rate on a shorter spring.
http://www.hypercoils.com/
They sell various diameters, so you should be able to find one that matches exactly what you might need.