when I'm hiking I carry the 10mm (Glock) in case of bears . I'd carry my 44 mag which is a revolver and a bit better round with more penetration, but I've been tactically trained using Glock and semi auto striker fired pistols.. I'm extremely proficient and accurate with Glocks and 10mm recoil is not bad at all for someone that knows how to shoot. an Underwood ammo round is extremely deadly.
if I hit the city or just around the house, its 357 sig, again in Glock . plenty of penetration (which is usually under estimated for a self defense round but very critical).. and in the night stand next to the bed its a Glock 19 9mm. ( of course a rock river arms ar-10 in 308 is in the closet and a benelli semi auto shotgun staked with slugs and bucks is their with it , and a Ar 15 and Ak-47 are just there under the bed ... just in case)
most accurate fighting pistol ever bone stock.. the Glock 19
heres 15 rounds fairly rapid fire by me at 20 feet (7 yards) .. all in one hole the size of a spoon
Attachment 177288
being able to put rounds on target/enemy is more important then caliber.. If you have a 500s&w mag that can take out a grizzly bear but you can't aim it for shit , then won't do you much good