Practice does not make perfect. it does end to make permanent, though. So, whatever you practice, do it with as proper a form and content as possible.
Still, practicing some things can be dangerous. Practicing knife fighting skills pretty much requires a skilled sparring partner, but knives are inherently dangerous tools/weapons. So: rubber knives with the same form, weight, and balance as one’s primary edged weapon can make for Good Practice.
Similarly, dry fire exercises with firearms can help hone one’s grip, aim, and trigger skills, but dry firing revolvers is generally disrecommended. So. . . dummy rounds. But dummy rounds can make other firearms practices safer, as well. For example, practicing reloading revolvers using speedloaders. It’s just that wee tad safer.
I was glad to find some dummy loads for a wee lil revolver that were S&W “longs” instead of the more easily-found ACP dummies, since they more accurately replicate reloading the preferred round for that lil revolver (it accepts and safely fires either the ACP—”short”—rounds or the “long” though it was built for and functions better with the “longs”).
Sadly, the only company I could locate (only 40 miles away!EIGHTEEN DAYS for USPS to lose/find/lose/find/HOLD/lose/find and finally deliver it.
*smh* That is why I send packages via UPS. It’s just. . . Good Practice. *heh*