Dead Center 260 grain / .40 - Includes 12 pack with sabots.
The Savage 10ML-II easily generates much greater velocities with smokeless powder than is possible with any conventional muzzleloader. That combined with the quicker, 1:24" twist, left me with the opinion that a longer bullet, offering even better ballistics, would probably shoot great. I made several hundreds of the 260 Dead Center .40 and put them through their paces.
Early test results suggest a BC of .350 to .375. This translates into 800 ft lb of remaining energy at 500 yards assuming a muzzle velocity of 2150 fps. Nothing shoots flatter; nothing offers more downrange energy.