Quote Originally Posted by NickG View Post
Will try and test this further for now, then get the inertia idea in the gun , problem is going to be getting the spring rate sorted, it's also going to need some sort of buffer in there, and that too will wear.
yes agreed, but wear in that internal buffer won't make much difference to piston timing - it's just to avoid a hard metal-on-metal inertia weight crash. Maybe use something like a PU ring in the end ? O-rings aren't the answer to everything