Why ? It was the gun I had.
I changed. From 31 9mm "good people rounds" to five "big animal rounds" of .454 Casull.
I will leave it "to the student" to figure out why I thought and still think this is a better tradeoff.
A good place to start is "how lion attacks work" from the "Stalked By A Mountain Lion" book.
9mm and .38 Special are still my "house guns". Backed by an eight-shot Mossberg 500 by my bed.
I don't expect any home invasions. Rare here, but they have happened. Around two a year.
But, if a home invasion does happen to me, it most likely won't be a bear or cougar.