I go past parallel with my driver and 3wood 90% of the time - as long as my tempo isn't too quick I can avoid getting "stuck" and hit it well.
As for my irons I ::knock on wood:: never really go past parallel - if I do, it usually ends in a poor result either thin or duck hook.
As for my irons I ::knock on wood:: never really go past parallel - if I do, it usually ends in a poor result either thin or duck hook.