Redding Profile Crimp Die

JWinAZ

Well-Known Member
I used a Redding Profile Crimp die for the first time to crimp RCBS 150 SWCs in .357 Magnum. I’m impressed with the ease of making a good crimp using this die. Another thing I wish I had started using some time ago!

Profile.JPG
 
I have been using them since the 90's and they are great. I did some testing with some accurate revolvers and pistols in my Ransom Rest and found that the profile crimp led to improved consistency(chrono)/accuracy with my loads and that led me to use them in all my rimmed cartridge reloading .32 S&WL/Mag, .38 Spl/.357 Mag/Max, .44 Spl/Mag, .45 AR, .45 LC, 45-70.
 
After I saw how the first one worked I bought them for all my revolver cartridges. Even the 45 ACP in revolvers gets the Profile treatment.
The dimensions for a seating die and a crimping die are different. A seat/crimp die cannot do both. I wonder why it took so long to figure this out. Thanks Redding!
 
I only bought one, for .45 ACP, and I didn't care for the ratio of crimp to amount of bullet squeezed undersized in the case behind the crimp.

However, this reminds me that I've never been happy with the crimp any seat/crimp die has been able to give me for .45 Colt. The crimp is always lopsided due to all the radial slop inside the die. I'm thinking a collet crimping die is going to be the only solution, but perhaps this one solves that issue too?
 
Bottle neck cartidges and any cartridge that headspaces on the case mouth (rimless or semi-rimmed auto pistol cartridges) gets a taper crimp.

Everything else (which is mostly straight walled, rimmed, revolver cartridges) gets a roll crimp supplied from the Redding profile crimp die. And that roll crimp is matched to a crimp groove in the bullet if there is a crimp groove in the bullet.

Seating and crimping are done in two different operations.

Life is good.
 
I used a Redding Profile Crimp die for the first time to crimp RCBS 150 SWCs in .357 Magnum. I’m impressed with the ease of making a good crimp using this die. Another thing I wish I had started using some time ago!

View attachment 45611
NOW I can see it!

I've heard people talk about this die approvingly, sometimes with great affection and could not figure out what could be done with a simple crimp die to make it so amazing. This pic makes it clear what's gong on.

I can see why people like it. Was never a fan of the old-fashioned roll-crimp and some dies were worse than others for being a bit rough on brass or bulging it just behind the case mouth.

I'm vested in the LEE Collet Crimp Dies and they do a great job for me. Maybe these would too, but if these are better, I cant imagine better-enough for my uses to change, so I'll stick with what I'm using.

The only bottle-necks I still load for are 30/30 and 222. No crimp on either, even with cast. The 30/30 is a single-shot and the 222 was (looking for my next 222 in the form of a single-shot) a CZ 527. The CRF did not let the bullets I used in it contact anything on the trip from the magazine to the chamber, so I didn't need to crimp those either. I suppose if I had a lever-action 30/30, I'd probably crimp those.
 
Many years ago I was loading 38 Special cartridges with some type of good quality but conventional roll crimp die, probably RCBS(?). Somewhere along the line I aquired a set of Redding carbide dies and the set included the profile crimp die. It was a night and day difference in terms of the quality and consistency of the crimp that die produced. I switched all of my roll crimp dies over to the Redding Profile crimp style and never looked back.
Most of my taper crimp dies are also Redding but a taper crimp die is a much simpler form; any brand of taper crimp die would likely be similar.
 
I'm vested in the LEE Collet Crimp Dies
I use the same for my single shot .30-30 to remove the neck flare, but not crimp. I don't use much flare, really a step, but with the .310-.311 dia. bullets I need the neck to be straight to chamber properly. It works well for this. I did polish the internal edges of the slots to remove the sharp edge, no marks on the brass now.