the profile or taper crimp die , i like mine for revolvers , 30/30 , 308 , 223 in auto , 356 win and a few others that have bullets with cannulers ( sp ) , it holds the bullet in place better , and i get better groups . The roll crimp that is standard with most dies work but not as well as the specialty die ! If you use one make sure all cases are trimmed to the same length !
if you are new to reloading , never assume anything , never take advice that you can't find in a manual from anyone until you are confident in that source 100% and ask alot of
if nothing else we can tell you where to look !
the people on this or any other site are great folks but every once in a while you will run into someone with bad advice !
check out every bit of data offered ! and enjoy as we do !