make sure all your brass is trimmed to the same length when using the "roll crimp"
feature of the dies. also, when setting up your seating die using the roll crimp feature,
use a magnifying glass to look closely at the crimp compared to an unloaded case and make adjustments small until you can just see the case mouth get a slight taper.
I have found that a proper crimp can be had without feeling any additional resistance on the press handle. the roll crimp taper in the die will just barely touch the case mouth, and you can't feel it in the press. if you arent into trimming alot, you can use a Lee collet type crimper that
"squeezes" the case mouth instead of "butting" into it like the roll crimp/seating die.