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/

Tell me about mono-metal bullets in the thin barrels of a drilling. I have my 7x57R and a fair supply of Hornady copper bullets but haven't shot any do to the thinness of the barrel. Do these copper bullets cause any concern it these thin wall barrels?

I wouldn't shoot the Hornadys.

Here's a discussion about monos in combo guns.
http://forums.nitroexpress.com/show...ri&topic=&Search=true#Post374049