12 week mass routine

[Klimax]

I find that doing 3-5 reps 5 sets really builds bulk for me. Also generally do 3 exercises per muscle group, maybbe 4 if I am feeling extra energetic.
I have been working out and training for about 15yrs.

Till four reps you train only strength. With 5 reps only IIb fibres.

[decaman40]

Till four reps you train only strength. With 5 reps only IIb fibres.

do you ever go past the 5rep range into 8-10?

[Klimax]

Of course: different reps range train different kind of fibres.