Having weapons and ammo is fine along with the mental determination to not hesitate to fire them. Mental hesitation will get you killed. I won't have any mental hesitation if someone is trying to harm me. I have Pergo flooring and blood should clean up easily.
Now that you mention it, should be added to all "prepper" item lists, right after food, water, ammo, and a shovel.
Unless you are dealing drugs and get invaded by some addicts the odds of you needing to reload are very, very slim. It is the rare occasion when a homeowner who remains calm and gets off the first shot needs to fire a second.
The first shot, assuming it connects with the target is enough to inform everyone within 100 feet that you are pissed and not taking prisoners. Consequently they tend to hightail it out of sight and range.
May I suggest adding Crimson Trace Laser sight to your Ruger. At night they make aiming a breeze and short range shooting in daylight is deadly.
Remember a .22 rifle will easily go through your walls and into your neighbors house.