Saami Specs?

[dbshabo]

I'm looking at the chamber diagram on the saami spec sheet for the 6.5 Creedmoor round. I want to know where the rifling starts. I see the end of the chamber @ 1.925". There are three more dimensions listed after the end of the chamber. Can someone tell me what those dimensions are? Which one is the begining of the rifling?

http://www.saami.org/pubresources/cc_drawings/Rifle/6_5%20Creedmoor.pdf

Thanks
Shabo

 

[918v]

Those are the freebore length, freebore diameter, and leade angle.

 

[rcmodel]

Zactly.

The bullet dia Freebore starts at 1.9408" at the end of the chamber, and ends at 2.140".

The leade starts at 2.140" and ends at 2.302", where the rifling starts.

rc

 

[dbshabo]

Thank You very much.

Shabo

 

[helotaxi]

The full sized rifling starts at 2.302". The rifling starts at the leade though. The leade is the sloped front edge of the rifling that provides a gradual transition from the freebore to the main part of the rifling.