If you enjoy the forum please consider supporting it by signing up for a NES Membership The benefits pay for the membership many times over.
Be sure to enter the NES/MFS May Giveaway ***Canik METE SFX***
Broad topic.
Short version:
Revolver rounds: roll crimp lead and jacketed with a crimp groove. Stay away from jacketed slugs that don't have a groove.
Auto pistol rounds: mild taper crimp.
Most bottleneck rifle rounds with jacketed slugs: no crimp.
Straight-wall or straight-taper rifle rounds with lead slugs (older rifles): light roll crimp.
Does anyone crimp there metallic rifle and pistol loads. Is there any benefit in doing so?
The Lee FCD die for traditional "revolver" rounds (.38/.357, .44 Mag/SPL and .45 Colt) actually applies a roll crimp.
Or are you referring to the inner, upper collar which the top screw
applies to the case mouth?
Does anyone crimp there metallic rifle and pistol loads. Is there any benefit in doing so?
I have 3 single shot rifles 2 Browning 1885 and a Shiloh Sharps and I don't roll crimp for them. I use a redding profile crimp die and adjust it to just take the bell out of the case. IIRC from one of the reloading manuals crimping for SS rifles is not needed.