What kind of quest you running?  I still only have leather armor and an upgraded switch axe (upgraded only once).

still farming peco for the most part, prolly gonna move to something else soon. I'm at work anyways lol, you won't find me there until after 6PM PST.

you don't change it or anything, you literally just play music with it then smack with it lol. Watch my twitch video up there, I had a guy in our group doing it.

Is this not the Hunting Horn?

Nah it is a weapon

The Hunting Horn is a weapon. A very good one at that if the demo is anything to go by.

http://monsterhunter.wikia.com/wiki/MHP3rd_Hunting_Horn_Weapon_Tree

Metal Bagpipe Path (from Old Yukumo Flute Path)
Weapon Name	Attack	Special	Notes	Sharpness	Slots	Affinity	Rarity
Metal Bagpipe	80 (95)	+10	,,		O--	0%	2
Metal Bagpipe +	110 (125)	+15	,,		o--	0%	2
Great Bagpipe	140 (155)	+15	,,		O--	0%	2
Heavy Bagpipe	170 (185)	+20	,,		O--	-5%	3
Heavy Bagpipe +	180 (195)	+25	,,		O--	-5%	4
Fortissimo	200 (215)	+25	,,		O--	-5%	5
Hard Bone Horn	200 (215)	N/A	,,		OO-	0%	4
Hard Bone Horn +	210 (225)	N/A	,,		OO-	0%	5
Heavy Bone Horn	230 (245)	N/A	,,		OO-	0%	6
Hidden Tone	140 (155)	N/A	,,		---	40%	3
Demon's Darkflute	180 (195)	N/A	,,		OO-	40%	6
Toran Peco	130 (145)	12	,,		O--	0%	2
Toran Qurupeco	160 (175)	15	,,		O--	0%	3
Toropekurupa	190 (205)	18	,,		OO-	0%	5
63rd Division Military Harmonica	140 (155)	20/ +16	,,		---	0%	3
63rd Division Military Harmonica +	190 (205)	22/ +18	,,		---	0%	5
Hapurubokka Harmonica	210 (225)	30/ +22	,,		---	0%	6
Sho Land Horn "Battle Sound"	140 (155)	N/A	,,		---	-5%	2
Sho Land Horn "Beast Sound"	160 (175)	N/A	,,		---	-10%	3
Sho Land Horn "Pure Noise"	210 (225)	N/A	,,		---	-30%	5
The Ice Cure	180 (195)	20	,,		OO-	-20%	5
Ice Age	200 (215)	25	,,		OO-	-25%	6
Agnakordion	140 (155)	35	,,		---	15%	3
Agnakordion +	160 (175)	42	,,		---	25%	4
Flame Accordion	180 (195)	45	,,		---	35%	6

I guess this is what you're talking about?

Yea, that is the metal bagpipe I'm talking about, I thought the hunting horn you just blew and monsters came sometimes?  Kind of like the health horn or whatever restores some life of you and close by party members.  I didn't think the hunting horn is a weapon.  I thought it was an item.  Apparently, I wasn't on top of my game on MH3 as I thought I was.  Probably due to me sticking mainly with switch axes and maces.

Grinding offline. This game's controls sure are punishing.

Finally figured out how to trap stuff.

You'll get used to it :D after you play enough of it, you'll even know what's happening outside of your camera angle about 90% of the time lol.

Where do you buy bomb casings?

I need to make flashbombs, tranq bombs.

Gotta trap then Jaggis for my armor.