I recently bought an English hammer gun made in the late 1870s. Measuring the choke showed a strange pattern-at least to me. The bores constricted by 10 pts in the left barrel about 4" from the muzzle and then opened back up to cylinder bore in the last 2". Same in the right but only 4 pts. The barrels are marked "choke bored". It is a Birmingham gun of good quality. A GE Lewis with the London address instead of the Birmingham address.
It seems to me Gough Thomas wrote about this type of choke but I can't remember . Can anyone give me some information about what to expect as to probable pattern? I'm going to shoot 7/8oz 2" shells in the old gun.
