..I found several boxes of an interesting ammo the other day...it is a metal-piercing 38 special..150 gr. conical-shaped bullet...looked in an old 50s Gun Annual...ballistics rate it at 1100fps..WOW...back of box says adapted to several models including the Official Police Colt(which I own)...before I try a few I wonder if anyone has any thoughts...not worried about the gun blowing apart as it has a substantial frame ...(34-35 oz.)... but dont want to injure the firearm...this isn't intended for a steady diet for the gun...