clarence said

seewin said

I cannot imagine the sear spring causing the bolt to close harder. You are compressing the sear plunger spring and firing pin spring when you close the bolt. The sear spring itself needs to be pretty heavy to maintain it in the up position while cocking. Look at the long lever long arm between that spring, the sear pivot point and the cocking surface of the sear. I can see that if you shorten it, it might not cock.

  

I meant the plunger spring compressed by the bolt as it first moves forward, & which isn’t a spring that Speedlock models had.  B parts diagram called it “sear spring plunger.”  Clipping one coil made a clear difference in force needed to close bolt, except it rendered trigger inoperable.

  

Ah, that makes more sense. That’s because w/o that plunger pressure, the front sear spring does not have enough umph to hold up the sear in the cocked position with the firing pin spring bearing down on it. I hate to even mention this, but you actually can lower the pull weight very slightly with very judicious use of a slightly lighter spring on the plunger. Unfortunately it is not worth the effort for what you gain. As I mentioned earlier, I feel you are better off living with the original design. Once you get used to it, it is really not a big deal, especially off the bench. The only trouble you have is when you go immediately from a sub 2 oz trigger immediately to a 3# trigger. We have always shot centerfire in combination with RF in some of our matches. My CF’s have sub 2 oz triggers and it is very noticeable when you switch rifles in a match.

    As far as the vibration sound/feeling on let-off. I think it is something you pick up with the stock on the rifle that reverberates through the stock. 

Steve