BSA CF2 22-250 bolt

[horseman]

I have a used BSA CF2 in 22-250. When I first saw it, the reinforcing rib on the bolt was on the right side of the bolt, and visible when the bolt was closed. I have fired it in this position many times without incident. A BSA parts diagram shows the rib on the right side of the bolt. I have since seen videos of this model being fired where the rib is very clearly on the left side of the bolt, and hidden by the design of the receiver. I have tried duplicating this position on my bolt and it seems that it will open and close with the rib on either side of the bolt. I have not fired the gun with the rib on the left side yet.
Does anyone know what the proper positioning for the rib is?

 

[Leeper]

On the right. It's true function is as a block to protect the shooter in the event of a case failure which could result in the extractor being blown out of the receiver.

 

[guntech]

This isn't a BSA but it shows how that "rib" acts to deflect material when a catastrophic case failure occurs ...

The shooter was not injured

 

[horseman]

Thank you both for the info.