[hammer Head 22]

I've been shooting wrist strap trigger, at 27". Shooting back tension. Couldn't get trigger to go off very good. So I length'nd my draw to 271/2". Now I seem to get the release to trigger much better. I don't have to tilt my head forward , feels much better. Any input as to why etc. would be much appreciated. I beleave it's caused me to use more back tension??