Could you share a shoulder routine you use with us??
i start off with seated dumbbell press. ill warm up with like 35's for 15-20reps....55-60's for 8-10reps....85's for 6-8reps...then ill get into my working sets. i usually go heavy on these(110lb db's) for about 8-10reps...3 sets.
next ill go to a hammer strength press like this. ill do 2 sets FACING the back rest, really hits the front delt well(both arms moving at the same time). then ill do two working sets the proper way(facing away from the back rest). i do these one arm at a time. all of my workign sets are a minumim of 10 reps...usually upwards of 12 good reps then ill do a few partials with the muscle really burning.
next ill hit this type of hammer strength press. usually a warm up set with a plate on each side, then 3 working sets of 3 or 4 plates per side. 10-12 reps and maybe some partials. i do these one arm at a time...
next ill move onto some cables. usually ill do side lateral raises. no attachment on the cable. i just grip the cable right before the little ball that is at the end before the clip. i grip it with an overhand grip. imagine you are standing there with the cable near your left foot, put your right hand like you were gonna cover your nuts...so thumb pointing towards the weight stack, pinky facing to your right. i keep that grip the entire way thru the motion so you finish with your pinky to the sky. 10-12 good solid reps, not much cheating on these, 3 or 4 sets. i superset these with face pulls. 12 reps, 3 or 4 sets...try to pause each rep at the bottom of the rep.
sometimes ill throw in a few sets of cable front raises. good form, 12 reps, 3 sets. these really pump up the front delt.
next ill do 3 or 4 sets on this. one arm at a time, 12 reps, no cheating.
finally ill do a set of reverse flies on this type of pec deck
you can adjust the pads so they are closer together in front of you, then you place your elbows onto them and move it in a reverse fly motion. really crushes the rear delts well.
usually when im on the hammer strength preses i throw in sets of shrugs on this in between sets. i only use a plate or two on each side and do these kinda slow with a good squeeze at the top of the rep. i see way too many people cheating on shrugs so they can do 3-4-500lbs...meanwhile their traps are tiny. i get much better results with less weight and greater contraction. ill do three sets like this guy is doing them, then ill face towards the back rest and lean forward and do the shrug. i feel it hits the lower traps well.