What's better for big biceps: 2 sets of 50 reps with 25lb

5x5 weighted chin-ups

>50 reps
>25 reps
stop

>>41732169
Pull-ups until failure and then weighted pull-ups when you're able to do more than 12-15 in a row

3 sets of 12 reps

>>41732194
Meant to say chinups actually, my bad

>>41732187

All i have are those two sets of dumbbells. I can do that many reps before I have to stop, what's the problem exactly?

>>41732169

Alternating arms, no rest pyramid

Given the 40s, I'd go
3 reps left
3 reps right
5 reps left
5 reps right
7 reps left
7 reps right
9 reps left
9 reps right

repeat 3-4x
do them slow & controlled; focus on the eccentric w/o swinging. when you can get all reps w/o cheating, add a rep at each set

>>41732169
Saw the 25lbs in half and do 100 reps.