The subject is home defense, so 25 yards is perfectly acceptable to me - I'll be using #1 buck, so let's see how long it takes you to put 15 shots on each of those 3 targets at 25 yards.
Why do I need to put 15 rnds on target? The objective in a defensive shooting is to stop a threat.
Statistically there is an extremely small chance that a threat would require more than 1 shot even with wimpy handgun rounds.
Gonna have to explain why you wanted to kill instead of just stop the threat in court. Why didn't you just use birdshot