I haven't shot any Beemans, quit looking for arrows once I tried GT LII's, but if HH weighed a dozen and only had 2 gr variance, it speaks volums for their QC.

Ican explain the two nock type requirements. If your bows claws that hold the string cocked flip up above the rail upon firing, you can use flat. The string tends to slide off the claws and be forced down onto the rail. If they flip down into the rail, the opposite effect occurs and half moon nocks ensure that the string is going to grab the rear of the arrow preventing a partial dry-fire. This is not written in stone, there are a few exceptions. Like was mentioned, you can use half moon type in a flat type bow, but not vice versa.