yes, I do have the Controlled round feed action. There is about 1/8 inch of non threaded area between the threads and where it steps up for the locking lug. I don't really see any reason why I wouldn't be able to add a few threads to be able to screw the barrel in another 1/16 to 3/32" to make it work. If that doesn't work for some reason I suppose I'll just have to make it a short mag caliber and call it a day. I've already installed the barrel on the target action for now and fired it this afternoon to zero the scope. I don't really want it on that action permanently as I'd rather have a repeater for hunting woodchucks.