You can dry fire your rifle all you want. Assuming you have an action of decent quality, it will not cause any harm. Dry firing is some of the best practice you can do, so keep doing it. Using dummy rounds just to use dummy rounds doesn't have much of a benefit other than probably limiting the amount of movement you see in the reticle upon firing. If you're able to go out shooting with a friend, then you can take advantage of doing "ball and dummy" drills. These are ALWAYS helpful no matter the experience level of the shooter. How it works is you will get behind your rifle just as you are about to shoot, you will turn away your head and your buddy will put either a live round or a dummy round in your rifle. You will then take the shot not knowing what is in your chamber. If you don't have a partner, you can load up a few mags and randomly place in dummy rounds. Pick a mag at random and start shooting. This is the best way to acknowledge whether or not you are anticipating and solve the problem. A majority of shooters will say that they never anticipate, but they are typically wrong. Because it happens simultaneously with recoil, it's hard to determine.