San Diego County jumped into California’s sprawling ghost gun fight this week, suing a 3-D printing filament manufacturer it says hocks material for homespun firearms in violation of state law.
Working with the Giffords Law Center, the county counsel sued manufacturer Polymaker, alleging the company made a “strategic business choice” to market and sell 3-D printer filament to Californians for the express purpose of building illegal weapons. The polymer filament is sold in spools that feed into 3-D printers, allowing the devices to form designs created by their owners.
Actually, those conversion cylinders are perfectly happy with modern smokeless powders suitable for their caliber. Though it’s more about velocities than pressure. I can load any smokeless .45 Colt for my cylinder that is listed for the standard pressures, (about 11,000psi). But it is highly recommended to keep your velocities no more than 850fps, (the original velocity for the Colt SAA). Frame stretching is the issue. Those cap and ball revolvers are made from a bit softer metal than modern revolvers. Remington’s are stronger than the open top Colts.