I have a box of sst 250s purchased two years ago. Never shot any. I have part of a box of shockwaves from last year and a new box of shockwaves from this year.
The cups in all three are very similar. They all have steps in the cup. The major difference is in length and thickness of the sabot. The new shockwave sabot is nearly 1/8 inch longer and the petals are thinner. Last year's sabots are thicker and harder to load. The SSTs are very similar to the new shockwaves, but seem to be a bit thicker.
Again, I wasn't trying to cause controversy, I just wanted an aftermarket sabot that I could use in shooting all of the projectiles.