Started with 11's ... they worked "OK".. with about a 5% failure to fire on the first attempt.
Went to 10's... big improvement. They do seem to like to be seated with a pusher-dowel for 100% reliability. These are with CCI's, and I think I'll take the earlier respondants suggestion and try some Remington 10's next time thru. The CCI's just do not seem to fit with complete confidence inspiring precision.
Thanks for all the advice. I am trying to shorten the learning curb and not waste money. I have already spent $174 on it and still have to buy powder, caps and a holster.