The ONLY good blanks I have drilled with my, I will call it, "not the Silver Bullet Pro" have been after I made sure all my drill table adjustments were made and I dialed in and started using the laser crosshairs.
I use a mechanical pencil so it's always consistent in width.
However, it can be hard to see that the laser crosshairs are dead center on your pencil mark.
To fix this I have found putting WITE OUT on the wood and sanding it smooth around your pencil mark gives me the best color contrast between the pencil mark and surrounding area. You get a better defined "bright spot" on the lasers when they cross over your pencil mark.