The weight isn't the most significant factor. What is most significant is the projectile configuration, i.e. say contrast a 150 grain Barnes' monolithic solid versus 150 grain Sierra hollow point. See my point? In such a case, sectional density (which is what you are really asking) is nearly a mute point. By the way, a Monolithic Solid is not needed for hogs, unless they are truly massive. The massive hog that I took in 2001 was taken with 2 shots of a Federal Premium .375 H&H, with 300 grain Nosler Partitians. The beast did not so much as flinch. IMHO, expansion is needed, but controlled expansion. If I were taking a .30-06, I would prefer a 150 for small hogs, a 165 grain for medium and a 180 to 200 for the massive hogs. In closing, remember, placement.
Doc2005