Cracked lug

[Mills]

That is a new one for me. Best thing to do is send to a qualified gunsmith to get checked out.

[Bill Murphy]

Put a dot with an indelible magic marker at each end of the crack and go out and shoot a round of skeet with normal loads. See if the crack moves. Then shoot as many heavy loads as you feel comfortable with, one at a time, examining the crack after each shell. Others may differ in their opinions about how to handle this. An expensive gunsmith may use a similar tactic.