Quote Originally Posted by The_One77
If you can lift a weight more then 10 times, it's to light.

I don't think thats quiet right because you can gain quality muscle by going up to 12 reps for sure.
Generally you would be looking for the 6-8 or 8-12 rep range for mass.

David Tua, realise also that you should do lesser sets for your triceps and biceps when in contrast to your chest simply because they are smaller muscle groups.
Nah the reason they say no more then 10 is because 10 reps roughly takes less then 60 seconds to complete. This use ATP as it's primary fuel source, thus focusing on fast-twitch fibers (strength, size). When reps go for longer then 60 seconds, the aerobic fuel system is used and slow-twitch fibers are activated (endurance) reducing the effect of strength and size. So if you want to focus on increasing strength and size, then the weight must be heavy enough to do 4 or more, 10 or less.