Thel
Blackhawk
Count me in on the .44 Special. Don't think the GP as it is now has the dimensions for .45 Colt. Dave Clements ( http://www.clementscustomguns.com/rugerdarevolvers.html) claims his .44 conversion can handle a 250 gr slug at 1200 fps. Gary Reeder does a .41 mag conversion on the GP ( http://www.reedercustomguns.com/revolvers/skorpion.htm ) but is a bit more pricey than Clements. Be nice if Ruger configured the GP slightly larger (much as Taurus has it 5 shot .44 mags and such ) to take .45 Colt, .44 mag, 7 shot .357, etc.