Ann: Webcast - ABM Provides Old Pirate Update, page-5

I didn't really answer your question at all with that reply. In a nutshell;
Resource at OP is over 700koz at over 10g/t -mostly inferred.
Mined head grade is averaging around 15g/t across most of the veins that hold most of the resource. Average vein width is 0.5m but ranges between 20cm and several ms. Average grade within the veins is around 24g/t. Narrower veins often carry much higher grade. Despite narrow veins, mining dilution is relatively low and better than allowed for, resulting in the 15g/t head grade.
Production should be high margin at those grades but we probably will have to wait for actual production to know how profitable and even then with this deposit we should expect more variation between qtrs than for most other companies.