Quote Originally Posted by oneissuevoter View Post
The cocking spring is the first spring encountered by cam roller. It has a rat tail that acts as a retainer for the roller.



When talking about springs you need to realize two things.

1) compression weight

2) length of the spring.



The firing pin has two springs one is a heavy flat ended coil, the other is a light flat sided rat tailed.



The lighter spring that is compressed, to climb the ramp, is the one you "feel" when lifting the bolt. It is not a critical impact generator for the pin. Its sole purpose is to allow for a specified building in compression up that cocking ramp. That way you don't feel the weight of the main compression spring until near full lift- when you have the greatest leverage.



My fix alters the weight of the initial lift into leverage. Not the length of the final stack. Then the polishing of the ramp pays off.
No disrespect, but you have no clue of what you are talking about. Makes no difference if you have one spring, or five in a stack, they will all work together as one. The original springs in the Edge/Axis were 1 piece with the tail to retain the cocking piece pin. This single spring presented a problem because it could not rotate against the bolt assembly screw without "unwinding" and causing the bolt to lift after it was closed. The spring was then split and a ring washer was added as a bearing to facilitate rotation. The single spring version and the 3 piece version still have the same compression force. When fully cocked it emits 25lbs, when in the fired position, it is 15 lbs. In comparison to the standard spring set up in a model 10, it is 25 lbs cocked and 20 lbs in the fired position. The big difference from fired to cocked, is the free length of the spring, which will determine the spring rate. The model 10 spring is almost twice as long as an Axis spring combo.
You can still get reliable ignition from less than 25 lbs, but that's not the biggest issue. The big issue is having enough force left when fired to support the primer cup where the firing pin dented it. Upon firing there is about 60,000 psi trying to excape in any direction it can, and without something to re-inforce that little stretched out copper dimple in the primer, it will blank, sending gas through the bolt.
The tests that I have conducted showed that the .223 was the least suseptible to blanking primers in a situation like this, but anything with a large rifle primer blanked a primer everytime.