At today's ammo prices, I switched to laser dry fire practice.
The target and laser cartridges cost less than 2 boxes of ammo.
You can practice in your air conditioned house. The laser immediately shows you all of your bad habits with regards to trigger pull, flinching, anticipating the shot, etc
They are available in most pistol calibers and most popular rifle calibers.
They even have a semi auto version for most ARs that cycles the firing mechanism for true semi auto performance.
Rob Latham, Jerry Miculek, and all top pro shooters dry fire more than they shoot real ammo.