I just rechambered my remaining 44mag yesterday, I had the 445SM reamer all packaged up and ready to go in the mail to gunther66 yesterday, and Digger called to make sure I had the reamer, he told me that the floating pilot was too big for both his CVA and Contender barrel, so he rechambered them without the pilot which he said worked fine. So I decided I should check it before I sent it out in both of my 44mag barrels in case I needed to order a smaller pilot, although one is a 444 Marlin now, the pilot fit fine in the muzzle, and it rechambered the other barrel just fine, left a very smooth finish which you can't tell where the old chamber ended and the newly cut chamber starts, I don't feel it needs to be polished, looks great! The throat allows a COL of 2.250" which is just below the larger top cannelure on the 265gr FTX. I may get to shoot it tomorrow or Friday, depending on whether my back continues to heal, hurt myself last weekend playing with the boat smallie fishing, gettin old sure has it's caveats.
There are only 6 members on the 445SM list so far, it shipped out yesterday to the first, Midway and Grafs have the brass available which is only available once in a while, so anyone interested in making the conversion, now is the time to do it since the brass is here now. RCBS makes dies specific for the 445, but most members use 44mag dies which will neck size, I deprime with a Lee universal decapper, Hornady dies work on the pointy bullets, or you can modify the seater plug on most any seater die.
NOTE: a smaller(.4224") pilot will come on the reamer so no one should have a problem.