The optimized bullet for the 30 cal. bullet in non-magnum velocities is 165/168gr.
You are lucky to have several rounds which are VERY effective, and very accurate right out of the box. I'll list by price point, and number by my results. (A hundred-plus dead hogs can't ALL be wrong.....

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1. Federal ammo, blue box or brown box. Priced to make you really happy; $18 a box on average. The ammo is common in 150 gr and 165 gr. Accurate in 5 different rifles. 243, 30-06, 308, and I'll throw in the 7mm mag and 300 WinMag. Good bullet construction. If I am shooting a lot of hogs for eradication? I like this ammo a lot.
2. Winchester XPII ammo. Silver box. Medium bullet construction. Bang for buck, this round in 30-06 and 308 with 165gr. is my favorite bullet of all time. It's sweet accurate. Retarded accurate.... It breaks shoulders hard, yet the bullet mushrooms well in soft body material and flat out kills hogs and deer dead. Price is $18-24 a box in general.
3. Federal premium ammunition, Nosler ballistic tip. 165gr.
Its' by far the most expensive ammo on the list. It is match-grade accurate; then again, you will be surprised to find the Winchester is about 99% as accurate. When it gets up under a big boars' chest, it will simply turn the lungs into Jello. I can count on a heart losing half it's plumbing from the shock of the hit.
For a ballistic tip, it holds together longer than a frangible bullet, but I don't care what you shoot with it; the bullet is not likely coming out the other side. Usually, I hit a hog in the shoulder shield. There is a 'Whump' and a hog piled up RIGHT WHERE IT WAS SHOT. There is no exit wound. The pig does not get up and run. The pigs' lungs are now parked in his colon. His heart has a couple ventricles cut off. And he's not running, so chasing him is not much of an issue. The bullet breaks a rib or shoulder on the way in, then frags into about 10-300 pieces, and the energy is spent in the lung cavity, and the remnants of the bullet are stuck in the wall of the opposing rib cage.
Cost? $35-40 a box. Worth every penny. If you do not like to chase deer for long distances, these rounds are well worth every penny.
If I had to choose 1? The Winchester. Overall, the best value.