Have any of you used the factory crimp die for heavy bullets in the AR-15 that have no cannelure? I'm not a big fan of Lee products, but I haven't used all that many of them either, so maybe it's unfounded. I mainly got turned off to them from their bullet casting products. Of the 30 or so die sets I have, none are Lee. I like to use a crimp for the AR, but the 64gr winchester bullets that it likes with the 1-7" twist barrel no longer have a cannelure. I also saw the ads that showed bullet deformation and decided not to try one. What are your thoughts on this?