AR-15 with Hornady TAP FPD or Black Hills Mk 262 Mod 1 currently. I'd feel comfortable with any reliable rifle I'm proficient with, and have ammo properly selected for the task.
What prevents you from using a rifle at short ranges too?
Why would you choose a pistol over a rifle?
If you're defending yourself with any firearm then the excrement has hit the fan. Why would you advocate a pistol over a rifle to save your hide?
What leads you to write that?
This subject has been discussed at length here, so much so that the mods stickied one particularly good thread on the topic:
THR Rifle Forum Reading Library _ Useful Links
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"Overpenetration" and rifle rounds--the myth that won't die