I just ran across this small company that appears to target niche markets. They are making a 150gr .318 monometal that would be the answer to hunting with "J" bore guns in States and on refuges where non-toxic bullets are mandated.

I ask everyone who shoots combo guns of any flavor to contact them and urge them to secure an American importer/retailer. Check out their site.

https://www.foxbullets.eu/fox-classic-hunter/bullet-318-150gr/

Hunt with Class and Classics

Religion: A founder of The Church of Spray and Pray

Acquit v. t. To render a judgment in a murder case in San Francisco... EQUAL, adj. As bad as something else. Ambrose Bierce “The Devil's Dictionary”