A Weatherby forum would tout the virtues of velocity/lighter bullet weight for calibers on bigger game with the Barnes X, etc. This approach tries to equal the tissue effect of larger bore penetration/lethality by the X feature of the bullets at a higher velocity. Most twitchy combo-long for caliber bullets at high velocities and high twist rates.Pressures are a problem on the ragged edge as well as performance.

Verdict-Not near as predictable results when velocity is used to compensate for sectional density.It also does poorly when you have to shoot lighter solids at big tough animals.

No.1 with a big bore seems most optimal/efficient if lethal penetration is obtained.More velocity is morebetter but does it kill any quicker with non expanding solids when adequate penetration has been accomplished at a lower velocity? Would it add more shot selection/options for killing shots?