Can u please ecplsin why when u put a bullet in the breavh with your fingers the bolt wont close but when u put it in the magazine it goes in and locks done fine is thst a saftey system

I think you are asking for an EXPLANATION of why, when you put a bullet in a CHAMBER with your fingers the bolt won't close but when you put the bullet in the magazine, it goes in the chamber and the bolt locks DOWN fine. Is THAT a safety system?

ANSWER: No, it is not a safety system. I am assuming that you are speaking of a standard BOLT ACTION rifle in a centerfire caliber configuration. The extractor, located near the bolt face is why it won't close. When you put the bullet into the chamber and then try to shut the bolt, the extractor has to jump over the rim of the shell casing. When you place the bullet in the magazine and then shut the bolt, the bolt face pushes the bullet up out of the magazine allowing the rim of the case to slide between the bolt face and the extractor claw and feed into the chamber. After firing or if you simply just want to remove the bullet from the chamber, pulling the bolt rearward, the extractor claw hangs onto the rim until the case hits an extractor bar causing the shell to fly out of the rifle.
A good question.
I would suggest a firearms training session. Check with the NRA or a local gun club for help.