User blog comment:Artemis Paradox/The Official Monster Hunter Wikia Help Blog/@comment-1712810-20110622115211/@comment-5043481-20120709141440

I do black gravios with Diablo Z gemmed to Sharpness +1 and Chaotic order. These are not hard to get. On a black gravios the weak point is not the stomach (until you break it), the tail is a better target when he does his fire fart or beam. Spamming bombs would help a lot, you can take alchemy guide, 10 med monster bones, 10 ivy (for Lrg barrels), 10 large barrels, 20 gunpowders, 10 scatterfishes, 3 large barrel bombs and 2 large barrel bomb+. This will give you 12 Lrg barrel bomb+ and 13 regular ones. they are very good for hard shelled monsters and halved my garuga slaying time.

Without bombs with this tactic you will kill him with about 5 mins left.

Gunning is probobly better.