Provided we are not talking about terminal ballistics I think that the basic idea is that with a plastic tip bullet you can produce a sharp point and maximize BC. I believe the length of the bullets should be more consistent with the tip. While I think, but i'm not sure, its likely easier to produce a tipped bullet then it is a proper BTHP match bullet and as such the manufacturing costs are slightly less. There were some problems years ago with some of the Hornady AMAX bullets; they were coming apart in flight and this turned many a shooter away from them for competition. As I understand things, the Mfg process has improved to the point where we don't hear much about this issue.