When I wore spurs to shoot in, I want them tight, I had to bend them myself. Figure out what works for yourself. This is a custom fit, and only you, can really modify them. Besides, you learn some things....Like only you will know...
One draw back to having tight spurs to shoot in, is they boot area where they sit. It can become indented, if too tight, which changes the shape of the boot and the spur.
Great luck,