Crimping cast bullets

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  • Last Post 12 March 2024
2frogs posted this 01 March 2024

Been wondering if anyone has tried crimping cast bullets. Just enough to remove the bellingof the case mouth.might add a little extra tension to help out. Like I said just courious. Thanks

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Brodie posted this 01 March 2024

I probably shot more full power cast loads in a 458 WM than was good for me, and I never had a bullet begin to pull because of recoil while in the magazine.  I'm not saying that it couldn't happen, it just did not happen to me.  I always took the bell off of the case and added a light crimp.  My best accuracy was with a 550 gr. gas check bullet, lyman, ahead of 68grs. of IMR3031 powder.  I got .75inch groups for three shots.   I could not hold it that tight after more than three shots.  Recoil avoidance set in after shooting those loads off of the bench.  

I fully realize that with some minimum chambers if you do not take the bell off of the case it may not chamber.  Since we cast bullet shooters routinely use bullets 1 to 2 thousands over groove diameter, and most dies size the necks down less than necessary to chamber the bullets are generally held very tightly by just the sized neck. 

B.E.Brickey

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Spindrift posted this 01 March 2024

I crimp my 30/30s, I prefer the Lee factory crimp die.

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Aaron posted this 01 March 2024

More granularity is required.

All of my revolver cast bullet loads are roll crimped.

My pistol cast bullet loads are taper crimped.

My T/C contender cast bullet loads are generally crimped.

My lever action rifle cast bullet loads are roll crimped.

My bolt action rifle cast bullet loads are roll crimped.

My SS Rifles are generally not crimped with PP bullets.

 

44 MAG

32-20 & 32 S&W Long

38 Special

35 Remington

45-90 Paper Patch .442" to .451" (Bore Size)

 

 

With rifle in hand, I confidently go forth into the darkness.

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Tom Acheson posted this 01 March 2024

For all semi-auto loads....45 ACP, M-1 Grand, I use a Lee factory crimp, at the suggestion of Ed Harris, quite a few years ago.

I also use the LFC on other selected loads, all of which are CB loads.

Tom

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MarkinEllensburg posted this 02 March 2024

Taper crimp .45acp and 9mm, roll crimp revolver loads. Roll crimp .30/30 that are for hunting use only. Normally nothing else gets crimped. Until a week ago when I used a bushing sizer die and there was not enough neck tension on my .308 loads that I was testing that had deep engagement in the throat, I believe it was seating the bullets deeper when chambering which led to erratic results. Returned home and used a LFC die to crimp all the rest. That will be a one time deal unless I experiment after finding a suitable load.

Crimping is just another variable, no hard and fast rules that universally apply.

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Ed Harris posted this 02 March 2024

I prefer the Redding Profile Crimp in those calibers for which it is available, mainly in .32 S&W Long, .32-20, .38 Special, .44-40, and .45 Colt. In boltgun rifle calibers the Lee FCD adjusted to remove mouth flare only. In the tube magazine cowboy guns you want a well formed roll crimp.

73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia

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Buttersdad posted this 10 March 2024

I use the Lee Factory Crimp die on all of my loads. Like most here I roll crimp all of my revolver cast loads and my 30-30 loads, semi-auto pistol cast loads are taper crimped. I roll crimp all of my bolt gun cast loads.

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res45 posted this 12 March 2024

9 mm, 10 mm and 45 ACP get a slight taper crimp and finish crimp with the Lee FCD.  38 / 357 and all my rifle cast bullets have crimp grooves so they all get the appropriate roll crimp.

'Artisan' in Lead, Brass & Powder.

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