Reverse Missiles / not an "attack"

[RGTraynor]

Originally Posted by Rupert

I'd rule the attacks would bounce back and forth until they ran out of range.

With archery, a potential factor might be "how many seconds does it take for that arrow to do so?" For practical purposes, that's a detail GURPS avoids generally (at least as far as I've ever seen), but an arrow doesn't traverse a couple hundred yards in a second flat. Two? Three?

Originally Posted by David Johnston2

If it's a gun fight on both sides, then any dodging he'd do against bullets in general would apply to his reversed bullet. But what about firing from cover?

Seems like a GM would just have to apply common sense. If Shooter A is using a firing slit/pavise/sandbags, then the Reversed missile has the same penalties to hit him as any other ranged attack against Shooter A. If Shooter A is sticking his weapon over a parapet to fire blindly, then there's a chance (and not a great one) that the Reversed missile clips a hand. Etc.