(from Aug 2014)
A test of some DoubleTap ammo choices in .454 Casull, using a Raging Judge Magnum.
In this video I test DoubleTap's 400-grain hardcast wide flat nose ammo, a gigantic 400 grains traveling at a rated 1400 fps. Those numbers sound very much like a 12-gauge shotgun slug (438 grains rated at 1560 fps) so I compare the DoubleTap round against a 12-gauge Remington Slugger shotgun slug, and examine the results in ballistic gel.
Furthermore, since the hardcast load didn't perform like a shotgun slug, I test another DoubleTap round in this video -- an expanding hollowpoint, the Barnes 250-grain XPB. The Barnes bullet performs much more like a shotgun slug than the 400-grain hardcast bullet does. The hardcast bullet exhibits extreme penetration (45" in my test!) whereas the Barnes XPB and the shotgun slug both did similar damage and penetrated between 20.5" and 21.5".
Of course, these rounds would perform just as well from a Ruger Alaskan or other .454 Casull firearm; I tested them in the Raging Judge because that's what I had available, but there's nothing Judge-specific about this ammo.
Note: I'm not making any claims for these videos other than that these are the results I achieved, in my own testing, from the stated pistol(s). I have no intention to make a blanket endorsement or indictment of any product, only to review and report what I found in a given instance. Obviously it is incumbent upon each individual to conduct their own research and make up their own mind about which defensive ammunition is best for their own purposes, in their own firearms. Also keep in mind that individual firearms can be persnickety; my Judge may feed a particular round consistently whereas your Judge might not work as well with those rounds, so -- please conduct your own testing before trusting any particular ammo.