Heres what dave told me about my stock 2 barrels.
hate to be the bearer of bad news, but our Throater will not work with either of your two barrels.
Specifically, both barrels are hard-chrome-plated--High Speed Steel reamers will not cut hard-chrome. I'm not sure you'd want to cut through the plating anyway because bits of it could flake off during firing once the surface layer was compromised.
Secondly, the bore (land-to-land) diameter is undersize from standard. SAAMI and CIP spec for 9mm bore is .3460" minimum. In order to fit this spec, we grind pilots on our 35 Pistol Throaters to .3455"/.3450". Your barrel's bore is .3418", more than .004" smaller than it's supposed to be and the pilot won't enter it.