There is a little more to Russian rules. They don't allow carry with a round chambered. They find it very dangerous that so many american guns are carried at the ready. With no round chambered, the trigger is far less of a worry.
Absolutely. It is so fundamental, at the instinct level almost, that it didn't even came to my mind to mention it. Until absolutely necessary, you never chamber your weapon - "what if the trigger gets accidentally pulled!" :)
Even military guards on duty are by the military regulations explicitly prohibited from chambering their weapon until necessary:
209. Часовому запрещается: ..., досылать без необходимости патрон в патронник, ...
and only when the guarded security perimeter is about to be breached and the guard has already issued 2 verbal warnings, only then the guard chambers the round and makes the first warning shot toward the sky:
211. ...
Если нарушитель после предупреждения "Стой, стрелять буду" продолжает движение, часовой досылает патрон в патронник и производит предупредительный выстрел вверх.
