Is your bow cut to ceter? What is your draw.
I have a bow that is cut to center and I have a long draw. It is 53@28 and shoots the stiffest Carbon Express arrow made with a 250gr head.
I thought the same as you, had these arrows laying around from my CB days. One day I was bored and thought.....what the heck, and gave a try. They work ed great.
Load one up with as much tip wieght as you can and see waht happens. It can't hurt to try.