Mr Meece
this particular gizmo , hooks up sterolok on my phone thro blue tooth , you know what it does so there’s no heed to explain , except to say it give you MOA adjustments in less than a second , after taking all the weather condition into account
so 500/600 yards on a 4” metal gong should be quite easy ,
therse some good vids on the tube
any way mate I’m shocked and dumbfounded you asked , I thought you knew everything ?
Atb mate