From what I have been told, the 11º crown is one that gives the best accuracy as Larry mentioned. Another thing you might want to consider if you run a brush in and out of the muzzle on your barrel is to have a dual crown cut on your muzzle. The "brush cut" is a 60º cut and is supposed to protect the crown from damage caused by the brush exiting the muzzle. I'm certainly no expert, but the logic sounded pretty good. Here's a photo of what it looks like. Sorry about the size of the photo