Hi,
A lower loft could actually make the problem even worse. Let me explain. The most common fault amongst amateur golfers is coming accross the ball with an out-to-in swing plane, thus causing the ball to slice (move left to right in the air) this out-to-in swing plane also tends to create a higher ball trajectory and significant loss of distance!
By purchasing a lower degree loft driver you are in effect trying to fix the problem the wrong way. Yes, this may cause the trajectory of the ball to be slightly lower, but it will also increase the left to right spin on the ball - giving you an even bigger slice and not just loosing you distance but probably a few extra balls as well. This is because the less loft there is on the clubface the less backspin is imparted onto the ball, but the more side spin is imparted for mis hit shots.
Address the problem at hand. Fix your slice. There are a great number of posts on the site regarding fixing your slice. Simply type 'Slice' into the search box.
Good Luck & let me know how you get on.
