There is a You Tube Video on the GP100 .44 Special there are loads shared there that are a tad warmer then the stock .44 Special Loads in a reloading Manual. I do agree you need to stay within the limits set in pressure. I do know that some Ruger Blackhawk only loads do exist with .45LC but I am not sure with .44 Special. These Ruger GP100 .44 Special's the retail on them is not cheap so why take a chance in a investment like this. I would suggest in the long run if you want to run warmer loadings in .44 Special then use such loads in a .44 Magnum Revolver!