What exactly is the Wylde chambering supposed to accomplish???

Accuracy and high pressure.

Tighter tolerances and better accuracy with bulk 5.56 ammo. I run the wylde in all of my AR and have never had a problem.

It was design to handle 75,77, and 80 grain bullets for National Match course shooting. Turns out it can handle Nato spec ammo without pressure problems. Wylde chambering has become the default standard for AR manufactures.