BamBooBender put my name in there with some pretty heavy hitters. (no pun intended) It's true I shot some heavy bows in past years and I'll try to explain why. When I decided I wanted a Howard Hill longbow back in the 70's I had a chance to pick up one that was in stock and eliminate the 6 month wait for a custom bow. The problem was it was an 85# Big 5. At the time the heaviest bow I'd shot was a 70# recurve so I didn't know if I could even pull 85#, so I Took my wifes 35# bow and a 50# bow that I had, held them together and pulled them both to my anchor. After I found I could pull the weight I ordered the 85 pounder along with a dozen arrows.
When the bow came I got it strung somehow and started shooting. I found I could only shoot 3 arrows and couldn't get the 4th one to anchor. So I'd shoot 3 arrows, and then go pull them and when I walked back to my bow my muscles were rested enough I could shoot 3 more.I shot every day as much as I could and it got easier as I got stronger. Three weeks after I got the bow I killed a nice buck with it.
I shot every day, rain or shine. I shot in the day time and at night under the yard lights. I remember once I was shooting at night and it was snowing like crazy. Nancy came out and said, "the neighbors will think you're crazy" I said, " it's time they knew". :D I shot not just to practice but because I loved to shoot.
The more I shot the stronger I got and the eaiser it was to hold and control the heavy bow. Soon I was ordering more heavy bows. I had a 83# Zebra longbow that was 70" long. That bow ended up being my "target bow". I won the Worlds Longbow Championship in Alabama shooting that 83# bow. To me it pulled like butter and I could hold it for several seconds at anchor and shoot it all day long if need be.
The bows I had that pulled in the 80's felt easy because I practiced with heavier bows to build muscle. My work out bows were 104# and 120#, my hunting bows were 85 to 90# and my target bows were 80- 83# I soon developed a distorted physique, the lat muscles and shoulder muscles on my left pulling side were much larger than the other side. It was only noticeable when I had my shirt off. I was fortunate to never have any shoulder problems although now, years later my bow shoulder clicks and grinds sometimes.
Ok, so what's the point of shooting the heavy stuff? For me it was better accuracy with my hunting bows. Before I started shooting heavy bows I had been shooting and hunting for 25 years with bows from 50 to 70#. I did all right with these weights but I did even better with heavier bows.
To have good accuracy with a bow you must have control of the bow. In other words YOU shoot the bow, the bow doesn't shoot you. You must be relaxed without a lot of strain to be able to make a good shot. That takes muscle, and you develop that muscle from shooting a heavier weight than you normally shoot. If you want to hunt with 60#, practice with 70#
Today at 71 years old I've dropped down in weight considerably. I hunt with 55 to 60# mainly because the old body is wearing out but also because I don't shoot as often as I used to. I find I can control and shoot a 60# bow as well as I used to shoot an 80 pounder. In the DVD Masters Of The Bare Bow, the bow I shot was 60#. The average weight today I think is around 50 to 55#. The other reason I'm shooting less weight is these new fangled bows I'm shooting today perform so darn well that you don't need a heavy bow.