Hog vital zone diameter?

[65Carcano]

I'm trying to calculate MPBR and wondering what vital zone diameter to use. I know for deer you can be more generous with 6 or 8, but is 4 more prudent for hogs? Or should I go with 6 to extend my MPBR further?

[outbreaker]

Really depends on the size of the hog. I have shot small ones where the vitals would be the size of a baseball, and large ones that were the size of volleyballs.

[65Carcano]

I think I'll just stick with 4" then to be safe.