Page 1 of 1 1
Topic Options
Rate This Topic
#193853 - 08/07/18 09:37 PM Hard Crimp vs. Soft Crimp
bscott
member


Registered: 12/11/07
Posts: 123
Loc: Louisiana

Offline
Would someone be kind enough to tell me the difference between the two. I have been doing a lot of loading of late for my .357 FA. I ran across an article noting a special note to hard crimp the bullet.
_________________________
"THEY FALL LIKE DEAD WEIGHT"!

Top
#193854 - 08/07/18 11:00 PM Re: Hard Crimp vs. Soft Crimp [Re: bscott]
98Redline
addict


Registered: 10/10/10
Posts: 649
Loc: Eastern PA

Offline
Never heard that term used in relation to crimps before.
Maybe the difference between a taper crimp (soft crimp) and a roll crimp (hard crimp).

Top
#193855 - 08/08/18 12:23 AM Re: Hard Crimp vs. Soft Crimp [Re: 98Redline]
Bob Roach
old hand


Registered: 03/02/10
Posts: 829
Loc: Missouri Ozarks

content Online
When loading for my 38 Special that I will shoot in combat match's I will use a Soft Crimp. My 800 - 900 fps load using a 158 lead bullet will not require much crimp to keep the bullets in place.

When loading HOT LOADS a HARD CRIMP would be appropriate to keep the bullets from backing out of the shell case during recoil. The heavy weight of the bullet has a tendency to stay where it is when the gun is fired. With a heavy recoiling round this will have the same affect as an inertia bullet puller backing the bullet out of the case more with each round fired.
With a Heavy Recoiling Single Shot this is a non issue.
With a revolver, or magazine fed bolt action bullet set back is a consideration.

Bob R
_________________________
See You At The Range

Top
#193859 - 08/08/18 09:29 PM Re: Hard Crimp vs. Soft Crimp [Re: Bob Roach]
PsTaN
addict


Registered: 07/18/15
Posts: 458
Loc: Alabama

Offline
Anyone have pics of what they consider a heavy/hard crimp as opposed to a light/soft crimp?

I'm interested ...
_________________________
PsTaN

-Smith & Wesson Model 69
-Ruger Super Blackhawk Hunter
-Encore Pro Hunter

"Hold your horses, the elephants are coming, and out stamped Alabama"

Top
#193860 - 08/08/18 10:18 PM Re: Hard Crimp vs. Soft Crimp [Re: PsTaN]
Chance Weldon Administrator
Distinguished Expert


Registered: 09/20/13
Posts: 4127
Loc: Martin, Tennessee

Offline
I've heard of taper and roll crimps, but not soft or hard crimps.
_________________________
Formerly TN Lone Wolf

"We are only as strong as we are united, as weak as we are divided." - J.K. Rowling

Top
#193865 - 08/09/18 01:14 AM Re: Hard Crimp vs. Soft Crimp [Re: Chance Weldon]
Bob Roach
old hand


Registered: 03/02/10
Posts: 829
Loc: Missouri Ozarks

content Online
I believe the Soft vs Hard Crimp will mainly apply to the Roll Crimp. The more that you adjust the Crimp Die down, the more crimp that is applied to the shell case in the crimp groove of the bullet. With loads that do not recoil a great deal, you do not need to apply a great deal of crimp (Soft Crimp).
With a round that recoils a great deal, Normally Magnums, you need to apply more crimp than you would with a light recoiling round to prevent the bullet from backing out of the shell case (Hard Crimp). With a revolver you will have 4 or 5 rounds in the cylinder that will experience the bullet pulling force of heavy recoiling rounds being fired. Each round fired will exert force on the remaining rounds in the cylinder. This can lead to a bullet being backed out of the shell case to the extent that it will lock up the cylinder. The same thing can happen in heavy recoiling magazine fed firearms. A consideration, you have a bolt action that holds 5 rounds total in the magazine. You fire a round, and top the gun back off. Do this a few times, and the four rounds that have never been chambered have experienced a lot of bullet pulling recoil.
You are limited to just how much crimp that you can apply by the shell case. At some point increasing the crimp will buckle the shell case.

Soft Crimp: Just enough crimp to keep the bullet in place on a light recoiling round. Does not work the brass a great deal.

Hard Crimp: The crimp die is cranked on down to apply the maximum amount of crimp without buckeling the shell case.

Bob R
_________________________
See You At The Range

Top
#193873 - 08/09/18 09:53 PM Re: Hard Crimp vs. Soft Crimp [Re: Bob Roach]
PsTaN
addict


Registered: 07/18/15
Posts: 458
Loc: Alabama

Offline
A general search yielded this thread from another forum and it does have a pic that represents 3 degrees of crimp in .44 Mag. Mine look like the load on the left.

Crimp Pics
_________________________
PsTaN

-Smith & Wesson Model 69
-Ruger Super Blackhawk Hunter
-Encore Pro Hunter

"Hold your horses, the elephants are coming, and out stamped Alabama"

Top
#194252 - 09/06/18 12:43 PM Re: Hard Crimp vs. Soft Crimp [Re: PsTaN]
BushytailBasher
enthusiast


Registered: 10/26/16
Posts: 284
Loc: Chillicothe, ohio

Offline
In a revolver I usually go for just starting to flatten but not anywhere as much as the load in the middle. In a single shot however I do not crimp anything my 357 max loads are loaded to hit the lands and that's crimp enough. Mike Bellm told me not to crimp in a single shot even with H110 and w296. He's of the opinion the only reason to crimp is to prevent the bullet from moving under recoil which will never happen in a single shot.

Top
#194261 - 09/07/18 11:21 AM Re: Hard Crimp vs. Soft Crimp [Re: BushytailBasher]
freedom475
enthusiast


Registered: 02/26/10
Posts: 215

Offline
Most important thing about crimping...is to crimp in a separate step. Do not crimp as you seat! A spacer washer under your die as you seat makes this job really easy.

Heavy vs. Light is the most used crimp terminology.

A 357 bullet doesn't really need much crimp because the bullet is so light.

Case neck tension is a powerful part of a crimp. So if you apply a roll crimp really heavy you will buckle your shell slightly and reduce the neck tension...this is hard on brass and seriously reduces your crimps holding power. This is greatly amplified if you seat as you crimp because the seating stem continues to seat as the crimp is being formed.

Keep in mind that if you over-crimp "some" jacketed bullets..you can mis-shape your bullet and compromise the jackets integrity.
_________________________
Mister, why do you carry a 45? "Because Sam Colt don't make a 46."

Top
#194592 - 09/27/18 10:05 PM Re: Hard Crimp vs. Soft Crimp [Re: freedom475]
doc with a glock
old hand


Registered: 06/05/08
Posts: 955
Loc: Montana, USA

Offline
Interesting article about crimping and types:

https://gundigest.com/gear-ammo/reloading/crimping-handgun-cases

The Speer manual addresses crimping for magnum revolvers with description and pictures.

Doc

Top
Page 1 of 1 1


Moderator:  Chance Weldon, jamesfromjersey, Gregg Richter, Gary 
Hop to:
 Portal Sidebar
Who's Online
1 registered (Brenden) and 163 anonymous users online.
Top Posters
9608
s4s4u
9277
Whitworth
8701
jamesfromjersey
7643
wapitirod
7327
TCTex.
6334
KRal
5056
Gary
5007
Ernie
4704
Tigger
4461
pab1
4370
Dan B.
4127
Chance Weldon
4070
Gregg Richter
3979
Franchise
3755
johnwilliams
  Member Hunts
First Handgun Deer
First Handgun Deer

The Target Bulldog
The Target Bulldog

   Access Requires Login

Generated in 0.043 seconds in which 0.012 seconds were spent on a total of 14 queries. Zlib compression enabled.




Copyright © 2000-2008
HandgunHunt.com, Inc.