If you’re new to firearms, choosing a pistol caliber for self-defense can feel like deciphering a foreign language. From the nimble .22LR to the powerhouse 10mm Auto, the array of handgun rounds available today is enough to leave even seasoned shooters debating. Should you pick the caliber first, or the firearm? Why are some listed in inches, others in millimeters? And most importantly: which one will keep you safe?
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