No disrespect Mighty but the announcement states that there is...

No disrespect Mighty but the announcement states that there is only 78.3,000 ozs underground at challenger.

Mineral resource total 277,00 oz.
A mineral resource is a mineral concentration which is known, estimated and interpreted from specific geological evidence and knowledge and with reasonable prospects for economic extraction.

Ore reserves total 78.3,000 + 5.1,000 in the stockpile.
An ore reserve is an economical minable part of a mineral resource where appropriate assessments and studies have been carried out to show that the deposit can be mined at a profit after consideration of all factors impacting a mining operation.

Cheers.