I received a new Adams & Bennett Savage barrel finish chambered for 250 Savage.
Five new Remington 250 Savage cases protrude from the barrel 0.120(2), 0.121(2), and 0.122, measured with a depth micrometer. Savage bolt faces measure about 0.115 depth, which would allow several thousandths clearance between this barrel breech and a Savage bolt nose, when this barrel is screwed in until it is tight on a case or gauge. A GO gauge should be slightly longer than a case.
Headspace measurements I have for the 250 Savage are:
(GO 1.5792)
(NO GO 1.5852) = GO + 0.006
(FIELD 1.5892) = GO + 0.010
If this barrel is screwed in until it barely touches a Marlin XS7 bolt nose, there will be about 0.008 to 0.010 free space between the case and the XS7 bolt face, which is 0.130 deep. This makes the chamber between NO GO and FIELD size, not dangerous but not good for a new barrel installation.
Note that the barrel CANNOT be screwed in until it is tight on the new case, or tight on a GO gauge. The barrel will tighten against the bolt nose first.
Bruce
PS Five new Winchester 243 cases protrude from the Marlin XS7 barrel 0.138(2), 0.139(1), 0.140(2).
