Wolfgang
just a thought: whenever I had problems with a BBF not closing, it was the cartridge! in the rifle barrel.
Most often different manufacture with different rim-thicknesses.
On a tight gun a fraction of a millimeter is enough.
Sometimes it just was a build-up of dirt preventing the cartridge from fully seating.
If it does not close with empty barrels, then that is a different problem - but, as you say the gun did shoot with those barrels in the past, then I would first check for any build up of dirt/hardened oil on the mating surfaces.
As you know, tolerances on a well made gun are very small.


Just my ten cents...

Best Regards
und WaiHei

Gnter
NRA Life 1974

Last edited by Gunter; 01/10/14 11:24 AM.