This Ocats system looks interesting in particular for dry fire practicing right in the house!

Ocats practice system


"With the addition of a laser training device to your firearm, the OCAT System can change almost any location into a virtual shooting range. Basement, rec room, garage, all can become your very own practice range. In laser training mode, dry-fire your firearm while the OCAT System records each laser flash as if it were a live round fired down range. Instead of spending potentially hundreds of dollars in live fire practice sessions, use a laser training device to fire thousands of virtual laser rounds for a fraction of the cost."
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I tested rifles chambered for various cartridges and learned about woods cartridges.

Hunters will do better shooting the most powerful rifle they can handle!

Those that use tiny bullets are passing up shots and hurting our sport of hunting.