I have been thinking of dropping a pound on the ball i throw I currently throw a 16lbs considering going to a 15 due to some shoulder issues i have going on right now

I have seen many people drop weights because of injuries or even age, but I was wondering about going up in weight. I have been throwing 15 pounds for years and I have a few 16s laying around and every time I break out a 16 I feel my back swing is lower and I am down on the shot better. I don't feel any extra pain if I use a 16 for 1 or 12 games in one day. Speed and rev rate actually increase slightly and more consistent. I just have never heard of anyone going up in weight except for kids when they are growing