I have a Marlin Glenfield Model 25 bolt action rifle. On another website, numerous posters talked about rep.lacing a spring with a spring from a ball point pen to lighten the pull. When looking at my rifle, it is made differently than a pic of one posted. anyone know anything about swapping the spring. They said it reduced the pull to about 3#. I dont want to spend any money on this, if it cant be done safely thats ok the gun shoots fine,just has a heavy pull. thanks in advance.