I am thinking of fitting my 4-5/8" Blackhawk with a red dot.
.45 Colt with max. load of 250gr @ ~1,230fps.
To keep the profile low, I am contemplating mounting an Ultradot L/T onto a Weigand Mini Scope Mount.
http://www.jackweigand.com/Ruger-Revolver-Mini-Mount.html

Does anyone have experience with this combination or can make a suggestion on this?

Thanks!