Rod I took the 223 barrel from the newer receiver and put it on the older receiver and everything appears to work correctly but I will not be able to shoot it until tomorrow. On the other hand the 30-30 barrel will not lock up on the newer receiver.
This will be a good idea, which I did suggest earlier in this thread. However, what I meant in this recent post is to take the locking bolts from the 223 barrel and install them in the 30-30 barrel to see if that makes a difference.