Snipers are already slow to level in comparison to other builds, they are cost efficient with the ammunition usage, but slower. Though with this feature you could potentially farm/craft ordinary or plasma grenades and level with them just as fine, eat some buff to increase strength and hex throw witch doesn't require much accuracy to hit big chunks of npc's in encounters. Currently a lot of grenades go to waste if you don't finish off those high health npcs if other npc does that (very annoying in deathclaw encounters where you are burning a centaur for the fourth time and leave it with few hp and that damn deathclaw steals your experience, arghh), with this feature you wouldn't have to and could be much more cost efficient with them.
Supported.