A question as to benefits of threading the action on the 457. Would doing so be of any "real" benefit or just a solution to a non existent (perceived/possible) problem of loose fitment or stress induced by the grubb screws....?
- Thread starter Merlin O
- Start date
Why thread it?
Go for a custom blank.
Machine the tenon to precisely fit the receiver/bolt face.
Cut the chamber.
Cone breach.
Index the barrel.
Glue it in place.
No threading.
Optimum barrel orientation and head space.
Go for a custom blank.
Machine the tenon to precisely fit the receiver/bolt face.
Cut the chamber.
Cone breach.
Index the barrel.
Glue it in place.
No threading.
Optimum barrel orientation and head space.
When I did my 455 my first inclination was to machine a close fitting tenon on a custom barrel blank and still use the set screw system for tension. When I measured the bore of the receiver it was bell mouthed by .0015, so I would have to set up the receiver to true it, if i'm going thru all that trouble might as well thread it. While I like the concept of indexing the barrel, I'm not sure I want a cone breech, it just seems delicate and that knife edge might catch or shear a soft lead bullet. But that is just my impression as I have not tried to run a push-feed repeater with a cone breech. Seems to me the real benefit here is in the installation of a custom barrel blank not particularly how it's installed as long as either is done professionally.
