Normal, thought the same thing when I bought a used 617. Guy standing next to me timing at a steel match really didn't like it. Open the cylinder and stick a round in the forcing cone area, it fits with a lot of space around it. I have also noticed its dependent on the ammo used.
To add to this post, does anyone know who made those laminate grips?
I've only saw the exact grip once on a Gunbroker auction 629, there are similar ones with S&W medallions.
I bought a used set at a gunshow a few years back. Value?