Good discussion.
I see both sides of the issue. I believe that people shouldn't play on ghe margins if they dont have to, but I understand the physical and economic (time, commitments and money) reasons that people shoot less weight.
I guess for me my threshold (arbitrary and random at best) is around fifty pounds. If I ever drop below that I will have to ask myself why. If it is because I am not investing the time and effort to be proficient at higher weights I will have to work harder. If it is because that's all I can manage I will have to be that much more disciplined with shot selection. Either way, I'm going to hunt with confidence within my self established limitations.
There is nothing scientific about the reason I am shooting the weight i am now. When I first started shooting trad I ordered a 56 # bow. I ordered the first one because was advised not to be overbowed as a new trad shooter, but I couldn't make myself order anything lower than mid fifties. I thought 56 sounded a lot sexier than 55. I've stuck with that because I am thrifty and like to be able to shoot the same arrows out of multiple bows when possible. Could I shoot more? Yes. Would I have to work at it? Yes. Do I feel compelled to do so? No. Do I have faith in my equipment? Yes
I guess the overall thought for me on low poundage is why shoot on the margin if you don't have to? The next question is what is the margin? I guess I answered that for myself above when I said my threshold was around fifty.
Seems like Nathan's, Jeff's and Terry's might be higher. Seems like RC's and Bisch's might be lower. Here's what I know about that. All these guys are thoughtful, responsible, seasoned and ethical outdoorsmen. They are also proven killers. They know their abilities and their limitations. When Nathan says we should push ourselves there is a message there. When RC says there's a lot of dead critters at the end of his blood trails that's a worthwhile message too. Bow weight is just one part of the package.