I have the Vulcan ACSS on a Shadow systems XR920, a shadow systems MR918, and a Beretta 92 LTT. The base of the chevron reticle is a great offset aiming point for close distance (i.e. 3 yds). Sage Dynamics has the Eleanor drill: one precision shot within a ONE inch circle (and cutting the line fails) in the head and transition to three rounds within 3 x 4 inch rectangle in the chest. Par time 2.5 sec https://www.youtube.com/watch?v=oiW4...l=SageDynamics
WIth a single red dot, i often overshoot the one inch circle and cut the line, which does not count in this drill. The round has to be within the circle. With the chevron base, it falls perfectly center within the one inch circle. The base of the chevron is also the aiming point for a 100 yard shot per instruction manual. I love this reticle.