Cool, I do stretch (seems like I'm the only person to ever do it).
Don't use full ROM though? You sure about that?
My opinion, I know many will disagree though.
Take the bench press. Locked out, all the weight is on your elbows. If you touch your chest with the bar, well, that's 2-3" further ROM than your shoulders wanna go.... and there is only minimal tension on the muscle at that point. But if you avoid the extremes of the ROM, just moving the weight in the middle 80% of the range of motion, you'll keep the stress on your muscles and not your joints.
Next time you're by a mirror, mimic a bench press and take a look from the side. Your shoulders don't want to go past the point where your upper-arm is about parallel with your torso. You have to really force your arms back to get your hands to your chest. We don't notice while benching bc all of the weight is pushing your arms down for you.
I figure if your body doesn't want to go that way without weight, adding a couple hundred pounds is just asking for shoulder troubles