Relief cuts?
Warning / Danger, Will Robinson!
Metfords, Lee Enfields, SMLE etc all breech up on the INNER breech ring, as do ALL Mausers up to and including the Model 98.
No4 and five series "Lee-Enfields" breech up on the front face of the body..
Also beware neatly done "Pins' used to "stabilize a poorly set-up "replacement barrel