If you hold the bolt body and hold light pressure on the cocking pin in the fired direction, there will be some movment indicating you are not bottomed out. A good flashlight will help also if you want to look under the head. If you do bottom out you will be compressing the spring almost .350" before it falls into the notch and comes to rest around .320" Fred nows these numbers better than I do but from what I have seen the factory sets it at about .250. If the ramp is modified the cocking ratio looks to be around .200" in 90* or less rotation. This is with the pin about .080 off the bottom.
Hope that helps.
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