Help with Grenade Launcher

[Griph1n]

I have never use them just collected them. Lately after watching a video showing the advantage of using them in some situations, I gave it a try.

Wow! the grenade bounce everywhere away from the target. Unless I shoot and hit the target the grenade is a waste.
Not all of them do this except for a few exotic that the grenade search target and stick to them
I want to use a purple legendary grenade launcher but they all have the same issue, it bounce off target . The scope is also ambiguous as to where the grenade will go. Any tips will be appreciated.

[Black Iron Cryomancer]

hold trigger to fire, release trigger to explode. dont need to hit the target per se, just be close enough they'll feel it.

or use a wave frame.

[the.angelhunter]

You can try to use wave frame genade launchers, they create a wave of energy when they hit the floor.
Examples are: explosivy personality, forbearance, and deafening whisper.

You can also look for the perk "Proximity grenades" in the second row, it increases the detection range

[DakotaThrice]

Setting aside exotics which may have different functionality there are three types of Grenade Launcher available in Destiny :

• Power - These have drum magazines and all use heavy ammo. There are three possible archetypes but they all share the same core functionality.
  
• Lightweight - These are breach-loading single shot weapons that use special ammo (with a single Exotic exception).
  
• Waveframe - These are similar to Lightweights in all regards except that they launch a wave of fire across the ground rather than an explosive shell.

Power Grenade Launchers are easy to use as they'll generally just explode wherever they impact unless they have a perk that says otherwise; Lightweight Grenade Launchers will explode on a direct hit against an enemy but will bounce off other surfaces, as already noted you can control the detention by holding/releasing the trigger; Waveframe Grenade Launchers don't care about timing but are meant to be fired at the ground in front of your target and are pretty much worthless if a direct hit is your goal.