I rechambered mine, and it was a piece of cake to do. The accuracy of the 44 mag was unchanged,and the 445 shoots about the same as the 44 mag accuracy wise. The only thing to change was the velocity,the 240 gr. Rem. bullets at 2128 fps.and the 300 gr.XTP's at 1977 avg. And I'm still a little off the max loads. I've got some 265 gr. Hornadys loaded now but hav'nt chrono'ed them yet. They are shooting about 2 1/2 " at 100 yds.and thats good enough for the hogs I'm hunting now. I suspect they will be doing around 2050 fps. or better. Digger
P.S. I rented the reamer from reamerentals.com