The face of the LTD bolts is rather small, and doesn't cup the ball very well...this causing chops. Sorry for the lack of pics, but I will try to explain this as good as possible.
What you need first is a pocket knife. Take the knife and port out the hole. Which means sticking it in the face, or hole in front of the bolt at sort of an angle and twist clockwise, or counter clockwise. Even stick it in vertical, but don't twist too hard. After you have ported it out. Stick the knife back in the hole, and round it off at the top, inside of the hole though, to help it better cup the ball. The hole should now take up about...half a centimeter from the top to where the groove is for the detent. It's is still reinforced at the bottom, because all you did was make it to where it would cup the ball. After that, take some sand paper. Tear off about an inch, it doesn't matter the grit. After taking off an inch, tear it in half long ways. After doing so, roll it up very tightly as you were going to roll a cigarette, or a rug up. Stick it in the hole, and twist it until it is smooth. In theory, this should help with chopping. My friend will be testing this in his wrath soon, with my modded bolt because I no longer have an LTD, just the bolt. Will keep you all posted.
Compliments to ESP.
Another thing mentioned by grivooga.
Another thing I did was fill in the area behind the inlet port inside the bolt so that it is a nice smooth curve. When they made the stock LTD bolt they drilled past the inlet port on the bottom. This creates a space of wasted air and the sharp reliefed edge should create unnecessary turbulence. I filled it with epoxy then shaped it back to a smooth curve after it dried.