Slitting projectiles on weapons not having their element?

Why do some weapons such as Mongol have projectiles that split out, but don’t have the same element?
Also Retcher and other E-tech splatguns have projectiles that split out of them when reloaded, but why are they explosive?

because there splash damage.

How does what you said relate to anything?

wrong thread. and i dont know.

They were just designed that way. The swordsplosion’s extra pellets are different than the main pellet, also the Harold.