If you want to add realism to your home dry fire sessions then you need dummy rounds and the best dummy rounds that I have used are made by ST Action Pro. Dummy rounds are a must if you want to safely and realistically practice realistic reloads and malfunction clearance at home.
ST Action Pro Dummy Rounds consist of 2 parts: a real brass case (and in some cases a nickle plated brass case) and a brightly colored plastic insert. The real case makes them extremely durable. I have chambered some of my dummy rounds hundreds of times with little damage. The brightly colored case makes it nearly impossible to mistake these for real ammo.
It should be noted that these are dummy rounds, not snap caps. There is an empty cavity where the rubber bumper would normally be on a snap cap. However, these can be made into a snap caps relatively easily (sounds like a future Tactical Handyman post).
Take your dry fire training up a notch with ST Action Pro Dummy Rounds.