Dr. P:

Based on the 13M/12B the gun is choked.

According to the dimensions given in the table "Scale of Proof" on page 300 of Greener's "The Gun and Its Development", 9th edition,

0.729 is the nominal bore (12) and 0.710 (13) is the nominal muzzle. This is about 20 points of choke.

Regards

GKT

Texas Declaration of Independence 1836 -The Indictment against the dictatorship, Para.16:"It has demanded us to deliver up our arms, which are essential to our defence, the rightful property of freemen, and formidable only to tyrannical governments."