Plug for Montefeltro?

[MOOREGROUSE]

Where can I buy a plug for a montefeltro, 20 gauge? Or does anybody have one that they can give me rough dimensions and I will make one?
Thanks.
Mooregrouse

[tucker301]

Just about any gun store gas generic plugs.
You can make one from a wooden dowel.
Cut it the length of two unfired 3" shells (not 6 inches), and test it.
If the third shell won't go in, note how much is not going and recut the dowel accordingly. Ideally, you should be able to insert the third round no more than halfway before it bottoms out.

Be sure to test with 2.75" loads as well.