I am a big fan of the Lee Factory Crimp Die. It works very well and has improved accuracy in many of my rifles. That said, I don't think crimping will help you at all. It will not take a 2+ inch croup and make it happy. You haveother issues that should be addressed first. With loads that will not find paperor 2 inch plus groups you need to look at the Rifle, Scope, Mounts, Fouled barrel, Loading tech., Shooting tech, Shooting rest, etc. etc.

Tell us more about your rifle, scope, loads etc. Then maybe we can help you zero in on your accuracy problem.