For the 23 degree rockets its about 1k, for the 45 degree its about 2.2k. That is assuming your parked, if your moving it changes. Nose up or down a degree makes a big difference on impact point.
Generally speaking I think the 45's are more usefull. I was getting pinged by town ack by the time I got in range with the 23 degree rockets. The good news is that unlike an M3 which would have been dead with 3 ack pings.
With the halftrack I just stopped, salvoed off a set of rockets, killed the acks. Dropped a supply, reloaded rockets, and rolled on again.
