From what I understand, reviews that compare different guns, ammo, and parts OBJECTIVELY and EXTENSIVELY are non-existent like unicorns. Most reviews tend to take a gun/ammo in isolation, so, you can't tell how it stacks up with the competition. (I understand that writers are specifically asked by the editors of the publications to do it this way, to avoid making anyone "look bad" compared to other products on the market.)
So, this article stands out as probably being the best review I've read because it does exactly that: it uses the same methodology to compare different barrels, and it shares the results.
Thanks for sharing, Rooster.