Good evening guys, I know we all like to test different spring tension in the quest for max velocity.When you start putting high hammer spring tension, you are inducing excessive wear on the action block. This side lever is poorly designed, if you take a look at the link angle right when the sear engages, it is near paralell with the lever. Even when it's at 45 deg angle, it means a 10 lbs. pull on the lever will only apply 5 lbs, pull on the probe, not withstanding frictional losses. A 15 lbs. spring will require twice the pulling force at 45 deg. and almost 5 times that at the last few mm of probe travel. I made a new longer link arm and move the pivot point to the screw that pulls the hammer. I had to put a curb on the link arm to clear the action block. It's a big improvement from stock but still need better geometry. I may have to put an extension to the back of the action and move the lever fulcrum back 8 -10 mm. If I get my balance valve finished for my .25 cal. then I can put milder springs and not do this extension on the action.
