When dry firing my Super Blackhawk Hunter off hand I have noticed that a large portion of the time at the hammer drop the crosshairs drop straight down a noticeable bit pretty uniformly. I have some precision rifle training, trigger control being a big part of it, but even when trying to be very disciplined its generally there. I initially attributed it to hammer inertia (at least that's how it "feels") but playing with the gun I notice there is a considerable amount of over travel in the trigger.
Would that, contribute to this?
Has anyone installed an over travel screw on their stainless SBH?

Vance, Though not stainless, I did it to a ?blue? Super Blackhawk around 1980. I had observed the same thing that you are experiencing. I drilled, tapped, and installed an Allen set-screw! It certainly helped my bench shooting, but, not so much my offhand shooting. I just can?t shoot a single-action (Ruger) as well as a Smith. Hopefully, you will see improvement......Good Luck! memtb

My youngest brother glue a reshaped pencil eraser to the trigger guard then file fitted it. It worked quite well.

You can drill and tap a stop but the eraser or piece of leather is a good alternative, and easily removed if you don't like it.

I had fixed trigger overtravel stops done to all my big bore revolvers and would recommend it to everyone I know. Trigger control is aided by having the trigger stop a very short time after ignition is occurring.

try the glue on first in case that isnt your issue and you havent drilled a hole in your revolver for nothing

Thanks all.
My thoughts were similar to yous so for now I went with a few wraps of wire to give it a try before I did something permanent.