I like to shoot a variety of bows, and found that a couple of years ago when I first tried 60 pounds it seemed just out of reach. Okay, I said, give it a rest. I put a lot of time in with 45-50-55 pounders, and then bought an old 60 pound Howatt Hunter for the heck of it this Spring. (It pulls an honest 60 on my bow scale)
Surprise - it was comfortable to shoot this year, and when I shoot my 50+ pounders, they feel like target bows. If nothing else, the higher weight bows build your upper body bow strength to make your shooting of the midrange weight bows improve. They also have more zip.
Egads - does this mean I will eventually move up to a 65 pound training bow to improve my ease with the 60 pounder?