I'd suggest 2 things, assuming you're using the old whack a mole lee loader, not a reloading press made by Lee.
Chamfer/deburr, with flat-base bullets it really does help.
Use a dry case neck lube. I use moly or graphite.
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”