I am running a Steelix on my team but I have 5 moves I want to use. I can't decide which one to ditch. The moves are:
Curse
Explosion
Gyro Ball
EQ
Stealth Rock

I really want to keep Gyro Ball Earthquake and Stealth Rock but can't decide whether to get rid of Curse or Explosion.

If your Steelix is a -speed nature, 0speed IV w/macho brace/Iron ball and if your team needs something to handle sweepers/stat buffers then explosion is best, otherwise curse will be necessary to allow gyro ball to do good damage, along with leftovers and maybe screen support to set up.

That's what I thought too. Plus, with Gyro Ball already having a base 150 power (270 with STAB) I don't really even need explosion

With Iron ball + -speed and 0IV Gyro ball does 150 damage to anything with speed higher than 176, the 270STAB does still pale before Explosion's 500 power (250base + opponent's defense is halved for the attack. =500)

I beleive her nature is -Speed +SpDef, so I'll just give it an Iron ball and use Explosion. I had forgotten that Explosion halves their Def and is actually twice as strong as Gyro Ball. Thanks for the suggestions