Is 10mm good for bear defense?
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Hiking in bear country. Is a Glock 20 in 10mm a real bear-defense option or do I need a big revolver?
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10mm is a popular and reasonable woods/bear sidearm — it pairs serious power with semi-auto capacity and fast reloads, and a Glock 20 with heavy hard-cast bullets penetrates deep. Be honest about limits: against a large grizzly, many still prefer a .44 Magnum-and-up revolver, and bear spray has the best real-world track record of all. For black bears and general trail defense, 10mm with penetrator loads is well-suited.