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There are other factors besides twist rate which determine what bullets you can (or should) use. What is your magazine length? 2.28" like an AR-15 or 2.8" like a typical short action bolt rifle? Can you even shoot the bullet you choose in your rifle? I'm thinking of the 220 grain LRB solid which is way to long to shoot from an AR-15 magazine.
Then there is the elevation where you shoot. You may not be able to stabilize some VLD bullets in cold weather or at low elevation. It's air density with matters. Air density can be calculated or measured directly. Obviously heavy subsonic bullets carry the most energy at the muzzle. Low drag bullets retain their energy best with distance. Low drag bullets also have the least wind deflection. You've got to hit your target in or very near a vital organ to get clean quick kills, but the bullet needs to transfer it's energy to the vital organs to be most effective not just pass though the animal.
Drop and vertical dispersion increase with the square of the time of flight for all bullets. That usually places the upper limit of the practical range of subsonic which are traveling 2 to 3 times slower than conventional hunting bullets. They will also have 4 to 9 times less energy than the same bullets fired at the velocity of typical supersonic hunting rifles. Subsonics certainly can kill, but they require considerably more skill to achieve effective shot placement.
So what's the best bullet for >your< situation? I can't tell you. The above is just some things to think about. Whatever you choose, practice with it so you can know what kind of accuracy you can achieve at various distances, partiularly in the presence of wind.
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