Ann: Pepper Resource Soars 99% to 873koz at 10.3g/t Gold, page-71

You could probably go through the announcements to get an idea of thickness of the ore bodies , I am guessing it is around 10 meters thick average ,
Say you want to take out virtually all the ore because of the high grade , then guess you would have to include around 700mm in to the hanging wall country rock and say 400 mm into the foot wall country rock so your 8 meter ore body would be reduced in grade (assuming no hallo effect) by around (0.7 +0.4) / 10 * 100 in % when they bring out a reserve .
Be interesting to get the opinion of someone like Craig Jones the COO on the above as I have no mining experience

On a narrower vein deposit the dilution would all things being equal be greater