I just ordered a Puma 454 Casull last week. It should be in tomorrow or Wednesday. It' s based off of the Winchester design. The performance of the 454 in a 20 inch barrel puts it close behind a hot loaded 45-70. 300 grain bullets going over 2000 fps. It holds 10 rounds and weighs six pounds! I hope I' m not disappointed. Mine is the stainless version with a 20 inch barrel and Hi Viz sights. For those who are not familiar with this rifle and would like to know more about it, a quick search in Yahoo under Puma 454 will turn up all kinds of info.