Maybe of interest to .45 auto & specialty projo collectors, here are some photos of a pulled and dissected SCMITR projectile and all of its component parts with measurements:
A complete SCMITR cartridge
Here is the complete projectile as it would be when in the casing. You can see the plastic pusher plate (which is actually cup-shaped with the open side facing down), the steel buffer disc, and the two-part plastic sabot with steel dart. The OAL of the projectile including the dart is 24.24mm, without the dart it is 19.42mm. The diameter of the sabot at the base is 11.05mm, and is 11.21mm at the top near the dart’s point. The total projectile weight is 37.5gr.
Half of the sabot is moved aside here showing the steel disc and the shape of the dart. The discoloration across the dart is a mystery to me; it is right at the point where the dart becomes thicker near the tip.
Here are all of the component parts separated, you can just barely see where the dart becomes thicker near the tip at this angle.
Here is a close-up of the dart showing it’s two bent stabilizer fins, each bending in a different direction to facilitate spin. The total length of the dart is 18.95mm. The thickness of the dart at its base near the fins is 0.22mm and its thickness near the thicker pointed tip is 0.91mm. The dart weighs about 5.0gr
Here is a shot of the projectile without its pusher discs, and this angle somewhat shows how the top of the plastic sabot is concave. The base of the plastic sabot is flat where it meets the metal disc. This shot also shows the deep groove running around the sabot where the casing is crimped deeply into it. The deep crimp can be seen in the first shot of a complete cartridge.
A very neat specialty cartridge!