A lot of misinformation abounds on the net regarding Super Vel ammo. It won't hurt your gun as long as it's in good mechanical condition.

The 29/629 will hold far more pressure than any factory loaded ammo has ever been loaded to. It just isn't able to do it day in and day out like a Redhawk will, without loosening up.

You may want to hang onto that stuff though. It is becoming quite collectable these days.