Hi Rick and Mark,
I love the 10mm. Rick, the 10 reloads very easily. The dies will work on either the 10mm or the .40 - same shell holder as well. Also, I use Nosler bulk packs (250) in either 150 or 180 gr - so shooting is pretty inexpensive, especially compared to factory ammo at $16-$20 per box. Also, you might want to try AA5 for a powder for the 10mm..?? Seems to work well...
Also - here is one of my 10's - Colt Combat Delta, which I "mildly enhanced"....