Remington abandoned the bolt locking feature because of accidental discharges when moving the safety lever from "safe" to the "fire" position . Sometimes done when unloading the rifle. People died from those accidental discharges and law suits filed and won by the plaintiffs. It cost Remington a bundle of money. Most go the other way if the trigger has the "old bolt lock when safety is on" feature, so the rifle can be unloaded with the safety "on". It is a trigger block type safety, and if the internals of the trigger become dirty / gummed-up or the trigger is not properly adjusted, accidental discharges are quite possible and have happened. "If a trigger has adjusting screws, someone is gonna' turn 'um."