It takes upwards of 1,000 miles to break it in. Until you break it in, leave the nose pointed up slightly so you don't slide forward on it so much. The more you ride it, the better it feels.

The reason for chopping B17s is to tension them. After so long of riding the leather, it'll become overly saggy and chopping/stitching the saddle pulls the worn leather tight again.

If you still can't get comfortable with it, either a) invest in a chamois or b) go with the Bell Gel cruiser saddle.