Over on at Papa Delta Bravo there is an old blog post about the non-differences between various handgun calibers. In one of the comments (http://www.papadeltabravo.com/blog/?p=978#comment-129471) the Amazing Tam (her blog here: http://booksbikesboomsticks.blogspot.com/ ) says this:
Caliber itself is bullshit. Capacity is bullshit. … Carry a gun that works. Carry the gun you trust and that you shoot best. Period fucking dot.
That really sums it up. Use the firearm (and the advice pretty much covers long-guns as well as handguns) you can use best.
Yes, it’s from 2009. But wisdom, or at least gun-smarts, can be perennial.