The reason I ask is because of an incident I had a few years ago where I almost had to shoot a jerk who decided he wanted to run me off of I-40, just because I didn't want to be tailgated with his Hi-beams burning out my retinas.
I had my Colt 1911 stuffed with Hardball but I suspect that it would have too little penetration against a SUV.
My other choice is a snubbie M-29. 300 grain rounds are pretty much impossible to get here and I am not setup to reload. So I pretty much have a choice of 240 grain SWC, Hollowpoint, or Softpoint, and 180 Grain Hollow Points.
Materials in all cars and trucks today are fairly thin, so any combination you choose will be sufficient. Even cars that have reinforced side impact material don't stand a chance.
But a wise gunner will avoid these types of situations at all cost. Pull over and stop, turn around and speed if you have to. A speeding ticket or one for careless driving is much less expensive than facing a grand jury.
Zorro, if a local ammo dealer carries the cor-bon line, talk to them. They make a "factory" loaded 305gr. "penetrator".
If this is not an option, I agree with the others who would go with either of the 240gr. non-hollow point options.
I hate to say it, but if you shoot at another moving car on the highway, youre probably going to jail, and for good reason. Why not just pull over and let the jerk go?