Gatsby,

.720 is all along the barrel, there seems to be no choke (pause).........definitively no choke.

Doug,

rifling is straight up to a few inch from the muzzle, maybe 5 or 6. Thanks for offering some help, sending parts that may be controlled in the US is not easy. One option would be to get a good number of the same bullets from a registered producer willing to export them and able to go through the red tape. From my end I had to do similar paperwork. A local importer of Hornady bullets has told me countless delays and problems. I am exploring the H&H option. Who is making their slugs/cartridges in the UK?

Daryl,

thanks beforehand,

EJSXS