Big Difference Between Max Weight and Rep Weight

Hey guys, I have sort of a weird problem. I can currently bench press a maximum of 195 lb. My goal is to achieve hypertrophy (increased muscle size). The recommendation is to do 8-12 reps at 70% to 85% of my max. This is about 135 lb to 165 lb.

However, I'm nowhere close to being able to do 8 reps of 165, especially on a later set. The most weight i can do 8 reps on would be about 150-155. What could be the problem?

Btw, I begin my workout doing 12 reps of 115 (60%). Should I increase my starting weight?
 
Percentages don't always carry across perfectly, I would stick to your 8-12 rep range - whatever the weight may be, it's more important to hit the number of reps you have set for yourself regardless of the weight
 
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