Like most gun nuts, I am never satisfied with what's readily available. I have been thinking lately of a .375 or .380 Revolver ctg. I am thinking of a case length of 1.28 and bullets that run between 140 and 200 grs. and loaded to pressures of 40K to 50K or so. I think it would fit nicely in the GP100 or the smaller frame Blackhawk. It will likely not happen, but it is something to think about when it's too cold outside for much of anything else.