The Accurate Reloading Forums
. . . to crimp or not to crimp

This topic can be found at:
https://forums.accuratereloading.com/eve/forums/a/tpc/f/4711043/m/835102234

23 February 2006, 07:08
MJines
. . . to crimp or not to crimp
In the reloading section on African Hunting Info, the following statement is made:

"Crimping is generally not recommended for doubles because it can prevent the rifle closing if incorrectly done."

For those reloading for big bore doubles, is crimping necessary? Recommended?

[Spare me the answer, "Like the quote says, just do the crimping correctly and there is no problem." Smiler]


Mike
23 February 2006, 22:42
Tex21
In a double, I'd imagine the other uncrimped load would act like you'd put it in a kinetic bullet puller and come apart under recoil.

Although I've never fired a double rifle, all the factory ammuntion I've run through everything else was crimped and functioned fine. I crimp everything I reload. If I ever were to own/load for a double rifle, I would crimp that ammunition as well.

FWIW, the only inaccurate reloads I've ever fired weren't crimped.

And that's my take on things.


Jason

"Chance favors the prepared mind."
23 February 2006, 22:46
RIP
Ditto Tex21. Crimp for doubles and sleep well. thumb
24 February 2006, 00:30
jeffeosso
if a gent had trouble with crimped cases in his double, he has other problems than his load

crimp!
jeffe


opinions vary band of bubbas and STC hunting Club

Information on Ammoguide about
the416AR, 458AR, 470AR, 500AR
What is an AR round? Case Drawings 416-458-470AR and 500AR.
476AR,
http://www.weaponsmith.com
24 February 2006, 02:39
400 Nitro Express
I've never crimped for any of my doubles and have never had a problem. It isn't necessary.
-----------------------------------------------
"Serious rifles have two barrels, everything else just burns gunpowder."
24 February 2006, 03:04
tiggertate
I am shooting a 505 Gibbs without crimping because the CH4D dies tend to rivet the shoulder before they'll crimp the mouth. I haven't had any bullets move under recoil yet.

If I ever use for it's intended purpose I will find a way to crimp each round and then test chamber each to be sure they still fit.


"Experience" is the only class you take where the exam comes before the lesson.
24 February 2006, 03:19
Robgunbuilder
I crimp all rounds for all my doubles and test to make sure they fit the gun before going hunting. Crimping may have the advantage of adding additional consistency loads that are not full case capacity.-Rob


Never underestimate the power of stupid people in large numbers to do incredibly stupid things- AH (1941)- Harry Reid (aka Smeagle) 2012
Nothing Up my sleeves but never without a plan and never ever without a surprise!
24 February 2006, 03:36
bwanajcj
I think tiggertate, has the nailed the reason improper or overly heavy crimping can bulge the cases out, making your gun hard if not impossible to close.

I wonder if lee would custom make a factory crimp die for some of the larger double calibers. Eliminating the problem.


LostHorizonsOutfitters.com
----------------------------
"You may all go to hell, and I will go to Texas"
Davy Crockett 1835
----------------------------
24 February 2006, 03:41
Cedarmtmike
I was told that lee would make a factory crimp die for any cartridge you like , just send them a loaded cartridge ( or maybe just brass, don't remember) and not for much money. Need to contact them about one for lott soon myself. Might be worth checking into.
Mike Allred


Mike Allred
24 February 2006, 06:14
Spring
Mike,
I had Lee make a .470 crimping die for me. It took about 6-7 weeks to come in after I ordered it.
24 February 2006, 06:42
lb404
quote:
Originally posted by Cedarmtmike:
I was told that lee would make a factory crimp die for any cartridge you like , just send them a loaded cartridge ( or maybe just brass, don't remember) and not for much money. Need to contact them about one for lott soon myself. Might be worth checking into.
Mike Allred


So far I have Lee factory crimp dies for all of my die sets even the wildcats. They will only make up to 45 cal and only on the 7/8"die body size so that lets out most of the nitro express loads except the 404Jeffery and the 450-400


square shooter
24 February 2006, 06:44
lb404
quote:
Originally posted by lb404:
[QUOTE]Originally posted by Cedarmtmike:
I was told that lee would make a factory crimp die for any cartridge you like , just send them a loaded cartridge ( or maybe just brass, don't remember) and not for much money. Need to contact them about one for lott soon myself. Might be worth checking into.
Mike Allred


So far I have Lee factory crimp dies for all of my die sets even the wildcats. They will only make up to 45 cal and only on the 7/8"die body size so that lets out most of the nitro express loads except the 404Jeffery and the 450-400. The 470 must be a new one as they would not make one a year ago when I had 10 dies made.


square shooter
24 February 2006, 18:11
Geronomo
Hey guys, check my post on the Double Rifle forums regarding the Lee crimp dies. I have them in .470 NE and .500 NE.

Geronimo