Just bought a Tasco mil-dot 6-24x varmit.Tasco's
instuctions in use are lacking ! I down loaded
a chart from another site.The information I
Can't find is at what power setting to work
calculations ? 24x ? 6x ?

10x is the standard.

yeah that tasco mildot scope needs to be set on ten power to work with the dots correctly. i own one of them and they are decent scopes for the money. enjoy your cheap thrill!!!

A friend of mine has a Bushnell 4200 mildot 6-24 which needs to be used on 12 power. It was set up that way so that with a conversion of 2x or 0.5x it would work at 6 power or 24 power. but the base setting is 12x

No idea about tasco though.

Brudford,
let me know how you like this scope. Ive been considering one to mount on a .223 NEF. I was planing to view a target with 1" grids from 100yds at various powers and then make my own calculations based on that.
Good Luck