Thank you so much marcus I'm glad someone else does drop sets. I do something very similiar to this except i start at my 3rep max then drop down about 20% then another 20% for the last 2 sets i do about 5-6reps(or failure). My question is how long do you rest? I usually rest under around 1 minute or less. Also I do 3 drop sets in all and after my first full drop set is complete i decrease the weight by about 20pounds and repeat.

Example:
Set 1 - 275x3, 225x6, 185x6

Set 2 - 255x4, 205x6, 165x6