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 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. If some shooters continue to irresponsibly use this product, we may have to discontinue it and that would be unfortunate as it is our best selling 44 mag. load and it gives great performance for those that use it responsibly however, as is always the case, irresponsible use of any product ends up penalizing responsible users. It would also be wise to read our “Technical Article” on “Dangerous Pure Lead Cowboy Bullets”, before using this (ITEM 4D) product.