While I no way agree with the statement about Ruger or Colt being junk.
Axis M, this from Buffalo Bore web site
NEW HEAVY 44 MAGNUM +P+
This new load is designed ONLY for certain firearms. They are as follows; Ruger Red Hawk, Ruger Super Red Hawk, Ruger Super Blackhawk or Vaquero, Freedom Arms Model 83, Taurus Raging Bull, Colt Anaconda, Magnum Research BFR and Dan Wesson Revolvers. Suitable rifles include T/C Encore, "modified" Marlin 1894 (see next paragraph), Winchester 1894, any rifle with a falling block action and the Handi Rifle. We get hundreds of emails asking if this load can be fired in S&W revolvers or some firearm other than what is in the above list. The answer is NO. The above list is all inclusive.