Most folks I talked to about the 219B on another talk board say that yes, the claw type scope rings won't stay in place. They shift under recoil. Very frustrating. Problem is, the scope grooves are narrow and small, and exactly to the same specs as those on standard .22 rifles. Fine for a .22, but not fine for a .30-30.
The most common solution is for people to simply have the rifle drilled and tapped for the two piece weaver bases made for the rifle, or to buy a really good sets of all steel claw mounts, and then drill and tap a "set" screw in front of the forward mount,inserting a screw sticking up, to keep the mount from shifting forward.
I have a 219B, with grooved receiver, and I am thinking about maybe installing an expensive set of claw mounts, and then taking a small flat punch and "peening" the groove a little flat just in front of the mounts. Not too much, just a ding. I think that this would probably keep the mounts from sliding. The small peened sections could always be opened back up with a receiver grooving machine.
I'll let you know what I decide.
Mannyrock