For a current comparison take a look at today NR from PG...
Hardrock
Pretax internal rate of return of 23.0 per cent and a 3.5-year payback at $1,250 (U.S.) gold and an exchange rate of $1 (Canadian) equals 95 U.S. cents
Brookbank
internal rate of return of 30.1 per cent
Still holding all my shares despite the one going price swings