Hello, Like most Italian made repros, I think it's luck of the draw. There was a write up in the ASSRA Journal a few years ago about a shooter that had a blow-back with one of these rifles. On the original Remingtons, the clearance between block & hammer is so tight, that a ctg. that is slightly too long, will not permit hammer to fall all the way to hit pin...This is a safety feature..the instant that hammer begins to fall..the block is prevented from opening. Lone Star actions are set up this way also.
It seems on the rifle that blew..the firing pin was stuck forward..when the hammer fell..it never reached the firing pin..it hit block & drove forward, firing ctg. BUT on this particular rifle there was nearly 1/8" clearance between hammer & block..so nothing to stop action from opening.
Only the tang sight saved the shooter from serious harm.. ctg. case slammed into staff, which drove into glasses frame & cut shooter above eye.
Shooter suffered burns to face.
I would check these actions out carefully!