I've been replacing stock Colt Grips w/ the slim/thin Chip McC.'s rosewoods. On one of my Series 80's Colts, one of the bushings was simply sitting (tighly) in the Frame - the hole IS NOT TAPPED (so much for Colt quality control in 1985)! Does anyone know the tap/thread dimensions so that I can get the grips installed properly?
Thanks & regards,
Roger