CLC has it right. In my reserve job (Combat Arms instructor and cop) the way weapons are stored when not in use is called rack-safe. That is; when the weapon is turned in, its cleared with the bolt to the rear, magazine removed and the selector lever on safe. The armorer then will send the bolt forward, close the ejection port cover, turn the selector leveron semi, and squeeze the trigger dropping the hammer on an empty chamber. This ensures that all the spring tension is removed from the weapon. Upon issue, the cleared weapon is handed to the cop arming up. The muzzle is put into the clearing barrel where bolt is sent forward, ejection port closed and a loaded magazine is inserted and the weapon is ready for post. In the Marines, we would turn the selector lever to semi, squeeze the trigger drop ng the hammer then insert the loaded magazine. The big difference was that in the Marines when the need to fire a round was needed, once the charging handle was cycled, it was ready for action whereas in the Air Force, you still have to turn the selector lever off safe before firing.
Today, any rifle that is kept for home defense, I still use my old Marine Corps training with an empty chamber, hammer down, ejection port (if equipped) closed and the selector lever on fire. It's really no different than a shotgun in "cruiser ready" condition. Need to use it, jack in a round and you're set to go.
I wouldn't recommend the OPs method. A bolt to the rear can be jarred chambering a round when you don't want one up the spout, and then there is the debate about spring tension being effected. Some claim it will weaken them and others say it won't. I say where there's smoke there's fire so I err on the side of caution and prevent spring load tension any time I can.