Add the second bead (a brass bead will do) and then stack the beads when you pattern.

That will help you focus also.

Hey been there ~ I lifted my head is all I can figure. I missed killing a find bird long ago and could not really understand why? It was at 18 yrds! The best I could figure is I lifted my head enough off the stock which caused me only to knock a few feathers out of the bird! I rolled it, the head and neck was extended and I was totally dumbfounded that bird flrew away! I absolutely hate wounding any animal. It happens, but I want to prevent that - so I went to what I described in a previous post. I used that combo for yrs until my eyes could not focus correctly due to age.

I have double beads on all my Trap guns. At set, b efore I call for my clay bird, I make sure my bead is what they call 'stacked' (Figure 8 in appearance) Then call for my bird.
If the bead is the way you want to go add the second bead as it can only help you not make my mistake!

JW