I have a Colt 1911 series 70 gov't model that I used as a range gun yrs ago. Fired exclusively with mild 185gr LSWC loads; about 6,000 rds thru the gun. I'd like to dig it out of the safe and put it back in service but first I'd like to switch to lighter springs. Recommendations? I'm thinking a 13lb recoil spring and a 19lb main spring.