I cut my arrows just a tad in front of the riser. I would rather have my broadheads out in front of my hand rather than behind my hand. I also shoot a drop away so I make sure that I will have no problems with a short arrow causing a broadhead to contact the riser before I am at full draw.

I had your exact bow and specs a few years ago and I shot carbon express CX300's and got excelent flight from them out of my UL35. I now use Carbon Express terminator selects out of my Phoenix 32. They area a bit tougher than CX's and I gained about 90 grains in weight. My bow did not like Bemans all that well. I have never been able to get them to fly good for me but this is just my experience. I know other people shoot them very well.

I was getting 265 fps with a 425 grain finished CX 300.