This thread is starting to remind me of when I owned the sport shop and all the guys that came in saying that a .243, .250 or 20ga slug was too light for deer. Then they told stories of how they flinched all over from the recoil of their .300's.
:D
There's no reason to "build up", unless you are seeking really big/dangerous game and maybe a big co-pay doctors bill for rotator cuff problems that often develop from being over-bowed.
From our conversations, Dan Toelke told me that he had made himself like a 37lb bow for his elk hunting, when he had some shoulder issues and that he wouldn't think twice about that weight, and that's for elk. He also said he has Canadian customers that specifically order 40lbs-for moose and kill every last one they shoot!
From my experience, I'd argue that one will get passthru's on deer not just with 40, 37 or 35lbs, but all the way down to 30lbs.
With my rotator cuff problems and 40lb bows, I have to look for my arrow after it skips away after the complete pass-thru on deer as it is now. Why should I bother hurting my shoulder more, shooting less accurately and having to look farther for my passthru arrow, just to have bragging rights about how much weight I can bench?
I'll take some pics this season and show what 30-something bows can do. I'm probably going to start the season out with either a 39lb 1958 Kodiak Special, a 38lb 1960 Kodiak Special, a 38lb 1961 Polar, a 38lb 1962 Grizzly, a 40lb 1959 Kodiak or a 40lb 1959 Grizzly. I fully intend to get complete pass-thru/50 yard kills with any and all of them.
I'd argue that shooting too heavy of a bow and not a light bow is which is the unethical of two.
Go to a shoot and watch all the guys struggling with weight, short drawing, not opening up the limbs, not using back muscles and shaking as try to draw to an anchor. I'd suggest that 70% of the guys out there would be much better served knocking 10lbs off their draw weight, instead of trying to add 5lbs.