LGM,
Ruger just starting making this year the .357 mag bolt action carbine. It has a 5 shot rotary magazine. You will find plenty of discussions of it on the Ruger topic board.
Unfortunately, gun reviews so far, using factory ammo, are reporting only 3 to 4 inch groups at 100 yards. Way too inaccurate for me, when you consider that it is a bolt action, especially considering its $650 price tag. But, since you had load, you may be able to get it to shoot alot better than that.
By the way, you may want to check the accuracy reports for the .44 mag carbine as well. I have never shot one or seen a review on them.
Best Regards,
Mannyrock