This type of performance is exactly what I have come to expect from my personal Vang Comp 870, as well as all of my department's shotguns. My agency certainly has bragging rights on the best performing shotguns in our region, thanks to Hans Vang and his modifications. We use Federal Tactical buckshot and Remington Reduced Recoil slugs. Qualifications and demonstrations have resulted in enthusiastic users of these shotguns.
I have no stake in the company, but certainly endorse a truly functional, yet simple improvement to the 12 gauge shotgun.