sgt_zim, you need to "reset" your seating/crimping die. If you can't get it to crimp like you want it to(mine works just fine) worse case, purchase a Lee Factory Crimp die. The Hornady takes some fine tuning to get it right, a LITTLE adjustment goes a LONG way...quarter turns on the seating/crimp die is all it takes to get what you are looking for. You do need a good crimp since you are tube mag loading these, but you don't need anything excessive! It is extremely critical that you load a sized piece of brass in your press and lower the die till you feel it "touch" the brass, should be easy because there should be a slight "bell" to seat your bullet. If you don't have a "bell" in your brass, that could also be part of the problem. You may need a Lyman M die but ONLY if you can't get the "expander" die to create a bell that isn't too wide to fit in the bullet seat/crimp die. Fun stuff! NOT!
Of course, once you get it set, you should be good to go!