I find this most interesting when you consider Ron's jug comparisons.
It leads me to believe the copper alloy Federal used/uses is hard and somewhat brittle. Nothing wrong with a "controlled" fracturing bullet but i doubt this bullet is meant to fracture by design.
Evidence is mounting that its expansion is a carp shoot. It may, it may not or it may fracture. Kinda inconsistent for a premium priced bullet. A simple change to pure copper would likely improve consistency and predictability.
Ive shot the Barnes 225gr XPB way way faster than designed. Considering ive more than doubled its intended MV it did better than the Federal. Within a wide fps window its very easy to predict how it expands. Ive yet to see it fail on media or game.
The same can likely be said for the new CF series by Lehigh if they fragment with less FPS requirements than the previous versions. Nothing ive seen seems to indicate otherwise. Im predicting the harvest pics later this year will confirm my guesimate.