There is no science behind an 11 degree crown, or any other crown for that matter. A crown is a crown, as long as it is cut perpendicular to the bore. As for a specific bullet type, that has never been proven.
The fact is, this no more than a trend that stuck. The 11 degree crown came about when a gunsmith cut a crown on a bench rest barrel without knowing that the compound was not square. When the cut was finished, he thought it looked cool, and just left it that way. So, naturally when he goes to the next match he gets questions. After he won the match, he gets more questions so he made up a bullshit story, and now everybody copies him.
The guy that told me that story was Fred Sinclair.