I am doing a 3x7 @ 50% Single Rep Weight (weight at which you can only do 1 rep before failure) and then 3x7@75% SRW
This is an only slightly modified version of Jimmy Pena's workout in the latest copy of Muscle Mag.

In the article it says 3x5@50 / 3x5@65% / and to failure @ 75%

Question - would you gain more mass doing these backwards I am failing on the last set...which is good, but I could lift heavier if I did the heavier weight first....