I'm no expert at this, but I don't think the distance from the target shouldn't matter, but I'd get farther back than 5 yards. If you are using wood shafts, bareshaft tuning can be expensive. The arrow will fly into the target at an angle and you'll break at least a few wood shafts. As far as the nocking point goes, I'd invest in a bow-square. It should get the vertical component just about perfect before you ever loose an arrow.
One thing you can try is a heavier point on the arrows you already have. This will lower the effective spine of the arrow and allow it to bend around the riser. I'd try that first. After all, heavier arrows delivery more energy to the target anyway...