Recently came into possession of a 1959 Colt National Match .45 pistol. To best of my knowledge it is all original and has only seen moderate wear for a match pistol that is 65 yrs old. I notice also that the recoil spring plug and barrel bushing are of a slightly peculiar design. What can you more experienced 1911 shooters tell me about the care and feeding of this match pistol. Hardball ammo okay to shoot? Recoil spring weights recommended, etc. Thanks.