Using your military service firearm to kill a burglar is a bad idea, but inside your home, you can keep all guns loaded, no problem. Carrying a gun loaded outside your home is considered unlawful, but then so many people CCW without permit and so few people are charged with illegally carrying a gun that this point is IMO moot.
We don't have specific ammo laws down here - almost everything is legal unless it's steel core, but even that is not really difficult to circumvent if one knows how.