Mate what're you training for? If you're trying to put on some size and gain a little bit of strength along the way, hit 8-12 reps for 3-4 sets. Ideally for dips I'd be doing heavier sets at 8 reps.
If you're training for strength, you want 3-5 reps for 5 sets.
If you want to look like sigma, keep hitting 15 reps and eating garden salads.
If you're training for strength, you want 3-5 reps for 5 sets.
If you want to look like sigma, keep hitting 15 reps and eating garden salads.