The Bindon Aiming Concept works great with some practice. Sometimes 4x is a bit much magnification when one is first learning to master the technique and in some conditions an ACOG reticle is not bright enough for one whose eyes and brain are not conditioned to the concept. I use a Leupold 2-7 with Firedot illumination to teach BAC. I start with 2x and the firedot rather bright and gradually increase magnification and decrease brightness. Most shooters can get up to 4-5x magnification using the technique while picking up targets and shooting nearly as fast(.1.-.2 seconds slower for the first shot, same split times)as with an RDS.
You will never begin in the fight you have planned for. You will begin in the fight the other guy has planned for. Retreat in a manner that leads him into your fight should he press his attack.