44Mags are a lot of fun in a carbine. Recoil is nice and managable too.
If you plan on sending you reciever off to get fitted for a 44mag barrel, do so at a time that won't inconvience you, because it might be there for a while. Just make sure to call and see if they have them in stock, and keep track of your Ser. Number and make a very detailed note on what you want.
-Aaron