casting weight varies/does powder?

[Willyp]

When casting,different lead mixes cause bullets to weigh more or less,than stated per mould.
If the load data is for,lets say,a 30 cal-173 grain bullet,but it cast closer to a 180 grain,do you still use the data for the 173 grain bullet,powder charge????? Or do you go to a 180 loading chart?

[Calamity Jake]

I always use data that is for the heaver boolit.

[tacofrank]

I too would load for the heavier bullet.