I did print bronze and copper fill from 3dJake ages ago on my late Tarantula. From that experience, I’d give a slow X1C print from the rear spool a good chance (dried filament and hardened nozzle), but I’d expect it to break in the tubing if printing from the AMS.
There may be a small chance from slots 2 and 3 if the tubing length has been minimized and straightened and it does not go through a splitter/hub (floating buffer, AMS on left of printer, raised and angled set-up minimizing curvature), but I’d be ready to take the AMS apart to remove splintered filament.
Edit: I really liked the copper fill as it could easily be weathered. Unfortunately, sanding/polishing did not work so well as that simply pulled the metal out of the print.