How do you get a meteor shot?

How do you get a meteor shot?

I want one but don't know how. Any chance There is a different and easier way to get to a floating island?

You can craft meteor shot with 70 regular bullets and one meteorite bar. Meteor shot bullets bounce exactly once, so shooting them upwards is a good way to find sky islands, since the bullet will come back down if it hits an island. The bullets can also pierce up to one enemy, but only if they haven't bounced already.

If you're looking for other methods of finding sky islands, take a look at this question (and my answer (/shameless plug)).

Meteor shot is a type of ammo you can craft for firearms in order to make 70 bullets you require 70 musket balls and 1 meteorite bar. These bullets are able to bounce off of hard surfaces making finding sky islands since you can either see the shot reflect back down or hear the sound of the bullet bouncing off walls.

Source: Terraria Wiki Meteor Shot