Whether or not it's necessary or whether those loads are useful is not really the point. Because I agree. The point is that there is this oft-repeated notion that the .45Colt is better with heavier bullets and it's simply not true. Even if it was true 30yrs ago, it isn't any longer. Seyfried's "Turbocharging" article may have been written in 2000 but the idea is rooted in Linebaugh's work in the 1980's.

Having shot comparable loads in nearly identical guns in both chamberings, I see the "less pressure" argument as an answer in search of a question.

And I don't know why you guys would assume I hadn't read all this material multiple times.

I agree on the "over .45 club", to a point. The .44Mag and .45Colt do a fine job for most critters in North America and even the big bears of Alaska. However, for anything bigger than deer, I do believe the larger wound channels provided by the .475 and .500 are more effective. It certainly never hurts to make a bigger hole with a big LBT.