matt068 - The smooth green (for .44) and smooth black (for .45) are a little thicker and probably what you are after. Same price as the Crush Rib the last time I bought them. They shoot well for me.

Harvester

MMP sells a three size thicknesses of sabot as well. HPH 24 is their middle thickness sabot. The 3 Petal EZ is like the Crush Rib. Doubt you'll need the thick HPH 12 but it might not hurt to try it and see.

MMP

A couple guys here have charts with sabot measurements. I'm sure they'll chime in.

Hope this helps,
Scott