i just bought a colt gold cup nm it was made in 2005 and in the book that it came with said that a green spring is for swc match ammo. my question is i shoot hardball ammo no reloads, do i need to change the green spring out to something else and what #'s should i use?

I highly recommend the Wilson flat wire spring a 17 pounder would be excellent for hardball.

cool thank you