I have shot the old style "skinny" carbons AFC/Bemaan/whoever made them for Cabelas of of longbows as my preference for many years. These are the type that used "outserts" for the tips. I don't think anyone still makes and sells them.
I do this for several reasons
First the small diameter usually a 1/4 inch or less works a lot better off the very narrow shelves of many long bows and even some asiatic style bows.
Second I found that the had incredible penetration. far better that equal weight and stiffness arrows of standard diameter. It was like the larger diameter tip plowed a bigger hole that the smaller shaft slipped through with very little friction drag to brake and slow it down.
Third I was able to pick up the whole shop inventory of shafting and tip/nock outserts REAL cheap from a shop that was having a going out of business sale


