I am always disturbed by these 'penetration' demos with bullets. Newcomers to this game are often still in a modern gun thinking mode and believe bigger is better. What we do should is not try to increase the effectiveness of historical firearms but, rather, to use them to the best of our ability within their (near) original limits. Promoting heavy bullets can lead to disappointment for the beginner, especially if trying to kill game at modern rifle ranges. The extreme drop causes accuracy issues many are not experienced to adjust to. Yes, I'm a prb advocate and tool old and stubborn to change. BTW, that video was not using a Hawken rifle. He was using a TC 'not-really-a-hawken-hawken' so named only for marketing purposes. Then I noticed his shooting range in the background, directly in front of a house.
For me, that destroyed any credibility that might have been shown in the rest of the video.