To those who actually SHOOT their 4 in. guns, what ammo do you use?
My 63 no dash hits 10-12 inches above POA at 25 yards with the rear sight bottomed out. This is carefully rested from the bench, with both W-W Hi-Vel 40 gr, or CCI Target 40 gr. My work-around has been to add layers of aluminum tape (0.004 in. each) to the ramp front sight. To get groups down into a 4 inch diameter bull, I've had to add 8 layers (0.036 in.), and to reach POA, I'm now at 10 layers (0.040 in.) As from the factory, the blade measures 0.200 in. tall, from the sight base. It would seem that, to allow for some adjustment "wiggle-room", S&W should have made the front sight 0.060 to 0.080 inch taller.
Has anyone else had a similar experience? If this was just your typical Ruger SP101 or GP-100, I'd opt for a DX conversion, but that's not about to happen with this gun.