You didn't say what pistol you are using this load in. If it's a Glock and it has the polygon rifling, it's not going to shoot lead bullets very well. Some won't shoot them at all which is what it sounds like to me. Polygon rifling and lead bullets usually doesn't work regardless of maker. The accuracy that you posted is not accuracy at all.
The Lee Classic press uses normal dies. If you are not expanding the case mouth, obviously you do not have the die adjusted correctly. You need to adjust the thumb turn on the top of the die down until it starts expanding the mouth. The crimp is in the bullet seat die and is adjusted by seating the die lower in the press and then adjusting the bullet depth.
Might take a look at the help vids at Lee so you can see what you need to be doing.