The bore measurements are available. Read them and weep in my case. .017, .016, .014 and my favorite .013” on four guns on my list watch list. Seems like there are a lot of thin barreled guns in this auction, so do your homework. To be fair each was noted as barrels being below recommended minimum. But to me .018-.019 is below, .013 is scary thin which ought not be shot except under need to defend yourself from certain death. And all are in proof.