I think the main spat there was that Burns does not think that the Speer Gold Dot will retain enough velocity at that range to show consistent terminal expansion due to its low ballistic coefficient relative to a streamlined bullet like the TMK.

So at 600 yards, the GD would likely pencil through the lungs. The TMK/ELD would open and function fine, which I take to mean what Formi was getting at in the first place.

The Gold Dot is a fun and consistent bullet, just not a truly long-range hunting bullet.