New research suggests lighter loads can be just as effective, but with lower risk of injury than heavy loads.
Personally, my experience agrees with the results of the study. I find that the secret to building muscle is to lift on a regular basis. The amount of weight doesn't matter so much.
Blade BLX 98. 26.75". 13.31 oz., 12.55", 359 SW. Outer mains skipped.
Prestretched Ashaway Kevlar 16 / Monogut ZX 16, 90/40 lbs.