I got a used Remington R1 awhile back, a 1911 GI type pistol, and it is putting a dent or crease in the sides of the cases when it ejects the spent cases after firing. They come out ok, and the gun fires fine, but the cases all have the dent in them. Makes the cases unusable for reloads. I was told it's probably the spring is rebounding the slide too fast, the timing on it is off. I'm wondering if simply replacing the slide spring would be worth trying? If so, do I need to contact Remington or is there a good source for other parts to try? Any advice?