What do you think about my casual MTG storm deck?

Land: 22 Mountains

Artifacts:

4 Pyrite Spellbomb

4 Barbed Sextant

4 Urza's Bauble

Instants:

2 Fireblast

4 Lightning bolt

4 Seething Song

4 Desperate Ritual

Sorceries:

4 Grapeshot

4 Ignite Memories

4 Rite of Flame

This deck does fine if it pops off and the opponent hasn't gained much life nor played many cards. Sometimes it goes off in three or four turns.