Sean
Once you are brakes off and rolling in this a/c, you are committed to landing straight ahead, whether on RW or beyond. You continue to say 600 feet is a "safe return" altitude, but you neglect to mention the distance from the departure end. It is my contention through experience and training (albeit 40 years ago) that by the time you reach 600 feet at any airspeed, you are not able to turn and land back on the airstrip of departure. I hope that isn't confusing, but if I am the only one who gets it, I'll be the one safely on the ground (hopefully) while others are rolled into a ball or on fire. (IMO).
AF clear of the active