Sportdog,
I installed my EZDrift rear and F/O front sights today, and my 75 BD Police is performing the same as my factory sites did.
With each set, I tend to hit above the bulls eye when shooting unsupported. However, shooting from a supported position, both factory and CGW sights each are right on the bullseye, when I cover the target with the front sight.
I didn't notice a difference between my reloads and 3 different +P carry loads (Gold Dot 124 +P, Federal 135 +P, Critical Duty 135 +P).
My reloads are with 124 gr plated bullets running about 1070 fps.