Have 2( in 223. & 45/70) but not that.243 cartridge/caliber. So far.. they have worked good. And i really like you can get the extra barrels( havent yet)& convert it to another rifle or shotgun etc- i just need to stop procrastanatng & sendthem to the factory ( theres atleast about 4 barrels id like to get - including pistol cartridges- 44 mag& 357.mag)