That was infill drilling, so a high "success" rate is to be expected.  In other words, they were announcing results from drilling inside an area where they had already had a successful drill program.  This can not be compared to attempts to drill a blind target.

http://www.firstminingfinance.com/news/releases/index.php?content_id=245

...been  following First Majestic for ages, held the stock long ago.  Good company, as is First Mining.

VP