Oldbloke wrote:"Come on suddenly".
"Only after firing".
Did you change ammo? Or change load?
Sounds like a pressure issue to me.
No change, I've looked at the last few rounds and can't find anything that makes me think of over pressure (not that I know anything
)
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They all look like this.
deye243 wrote:Have you lubed the cooking groove and cam not real terms but the only words I have for them .
On the bolt yes, not the grooves on the rifle though. It's sticky the whole way up, not like it's jumping out of a groove and then free just like it's stuck in honey the whole way. Unfired, smoooooth as
straightshooter wrote:Flyonline
deye243 is on the right track.
The whole issue is with the cocking cam.
You will have to dismantle the cocking assembly and carefully examine both camming surfaces.
There will be one of two possibilities, one is less likely than the other.
Firstly dismantle the cocking assembly and carefully examine both camming surfaces and look for any small dent or discontinuity in the shape near the beginning of the cam especially the cam on the bolt. The likely cause will be due to not completely closing the bolt to it's full extent. This will allow the nose on the cocking piece to impact the cam surface rather than land in the opening provided at the origin of the cocking cam.
The less likely culprit is incorrect hardening on either or both cam surfaces. If this is the case galling might be visible on the softer surface.
I've inspected closely, and there is a wear mark where the cam runs up the ramp(?) and possibly the beginning of a dent where the cam hits the ramp for the first time. Assuming this is the case, a bit of polishing with high grade sand paper an option? As above though, it's sticky the whole action not just to force it free.
Would a bent firing pin be a possibility?
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Ok, more like 1mm gap rather than .5mm
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Looks worse in the photo than in person, but could do with a polish?
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Very hard to get a good photo of the ramp surface with it's curved face.