Not sure about 4227 but with some powders like H110, you need good neck tension for it to burn properly. I would crimp.
i heavy crimp 44 mag for rifes and pistols for years. then i got the lee factory crimp and never looked back.
Is this Lee FCD a taper or roll crimp?One of the rounds that I find necessary to use a heavy crimp on to get good accuracy. I also use the Lee FCD on this round.
The .44magnum FCD is a roll crimp-- at least mine is!Is this Lee FCD a taper or roll crimp?
The standard FCD has a carbide post-sizing ring, and roll crimps. The collet crimper does NOT have a carbide ring. I prefer the collet crimper, it is not as dependent on trim length for consistent crimps.From what I understand the fcd is collet crimp. The CARBIDE fcd is roll crimp
They have all been trimmed. I cant remember if it was these or the 38spl starline I ordered from Midwayusa that came in a ziplock baggy but they were all different lengths and all got trimmed.I don't think anyone mentioned case trimming. If you want to have consistent pressure on your crimps you need to trim all cases to the same length. I had some new brass that had .010 difference in length. I had set my die to crimp on a short case and the long case had a distinct bulge behind the crimp. It was large enough to be tight in my GP.
This, you'll want a nice firm roll crimp to help get a good clean burn.I have noticed unburned powder in the cases of IMR4227 when I didn't have a firm crimp.
i trim all my revolver brass. one time and you're done. i haven't used new brass in years and, therefore, haven't trimmed in years. but, i can when my supply runs out (twenty years from now, maybe). i'm ocd with my pistols and even uniform all the primer pockets (another "one time and done" operation), so there is that!! i like accurate handloads for all my handguns.Also, I've never trimmed pistol brass before and never will for auto calibers, but I've considered it in my .45 Colt that I plan to hunt with. I've noticed some inconsistent crimps.