crimping for 9mm revolver

[SIGcurious]

For those shooting a 929 (or other 9mm revolver), what type of crimp are you using?  If reloading on a Dillon, are you using the standard 9mm die?  I normally load a FMJ bullet with a taper crimp, but I'm getting some coated lead bullets (never used before) and was just thinking if I should use a die that puts a profile crimp on it, but Dillon doesn't have an "Accu-crimp" die for 9mm.  I'm probably over-thinking this ...

 

thanks

[jcc7x7]

Taper crimp .002

Shoot 7 rounds and measure the 8th. Make sure it's not creeping out. Ie getting longer

[MikeyScuba]

I use a Lee fcd.  I just kept crimping until no more creep on rounds 7&8

 honestly never measured it.  There is an indentation on coated rounds but doesn’t affect accuracy 

Edited April 16, 2021 by MikeyScuba

[NoSteel]

5 hours ago, MikeyScuba said:

I use a Lee fcd.  I just kept crimping until no more creep on rounds 7&8

 I honestly never measured it.  I do get an indentation on coated rounds.

+1

[AHI]

.358 sized bullets . Standard taper crimp.  As above adjust till no creep.

Edited April 16, 2021 by AHI

[IPSCLUVERRR]

My load data that has not failed me with over 10k through my revolver the past two years. I shoot sc mainly and there is no power factor. 

 

.375" crimp

1.100 Oal

100Gn rn 

1.8 BA-10

Fed SPP

[ltdmstr]

Keep in mind that if you cut through the bullet coating, you're going to get lead in the barrel.  Particularly if you use a fast/hot powder.

[zzt]

My revo shooting SCSA buddies tell me they use a roll crimp to prevent the bullets from walking out.  They DO NOT use NLG bullets.

[AzShooter]

I shoot .358 bullets in Winchester brass and have not had pull-out problems.  I do not crimp because with my setup I've found accuracy to be improved with the .358s over a crimped 9.

[ysrracer]

On 4/15/2021 at 10:08 AM, MikeyScuba said:

I use a Lee fcd.  I just kept crimping until no more creep on rounds 7&8 honestly never measured it.  There is an indentation on coated rounds but doesn’t affect accuracy 

 

Yep, and I use a Lee U sizing die.

[firewood]

I also use a U die (EGW), a Dillon 9mm crimp die, .358 coated bullets and Winchester brass.

[ysrracer]

I think Lee and EGW U dies are one in the same.

[SIGcurious]

What is the advantage of the U die when shooting revolver ... little to no crimp needed?

[firewood]

1 hour ago, SIGcurious said:

What is the advantage of the U die when shooting revolver ... little to no crimp needed?

 

It is case mouth tension that holds the bullet in an auto-loading cartridge. A U die gives more case mouth tension, add just enough taper crimp to remove the flair. Since going that route I haven't had a single instance of lose powder in the cylinder. Prior to that I had a few.