[algol]

Unless you've got a very large house or very soundproof doors, odds are a burglar is going to hear either of those sounds (assuming a middle-of-the-night robbery). The shotgun is probably louder (can't say as I've done a comparison).

Storing a weapon with a round in the chamber isn't too bright.

Granted, I certainly wouldn't wait until I'm sure the burglar can hear me before chambering a round, I'll do that as soon as I pick up the weapon.

[Mulder]

Storing a weapon with a round in the chamber isn't too bright.

If you don't keep a round chambered, it will cost you a couple of seconds and the use of your weak hand which may or may not present problems.

[Shooter 2.5]

The only sound the burglar should hear if he's that close is the whispered phone conversation with the dispatcher as you cradle your shotgun pointed at the entranceway.