[BillCompton]

That said, I would guess the upper limit of missiles would be around 50 G's or so. Just a guess.

That would be getting really expensive. Fighter jets have the advantage of air. In order to generate 50 G's in space, you need one heck of a large rocket or one heck of a small payload.

[MonroeDNA]

"That would be getting really expensive. Fighter jets have the advantage of air. In order to generate 50 G's in space, you need one heck of a large rocket or one heck of a small payload."

Just a guess, but likely the missile's hard maneuverability depends on air reentry. In which case, a combination of side thrusters diverting exhaust and large fins would do it.

Even in space, diverting the exhaust would help a lot.