DDupleks Monolit 32 12 Gauge Steel Slug Magnum vs Cast Iron Rim

Just target shooting the DDupleks Monolit 32 12 Gauge Steel Slug Magnum (2,180 lb-ft muzzle energy) vs Cast Iron Rim. When it impacts other metal (ie, cast iron), the steel slug deforms considerably. But when it impacts softer materials (plastics, wood, etc.), it holds its shape extremely well.