Strange marking

[Amagalous]

Lee carbide seating die. Berry's bullets round nose 115gr. RCBS rock chucker press. Used that combination many thousand rounds. Today, the seating circle is leaving these marks on the rounds.

Thoughts???

 

[blazing lead]

Maybe damage or something off with the seating stem? Have you disassembled and looked at it by chance?

 

[ironpony]

I was thinking of an OAL difference but it does look long enough, rather than extra short, so I'm going with Aliens!

 

[outrider58]

Do you have similar but a different brand of bullet to try? It could just be the bullet composition.

 

[Squaregrouper]

I get these on my Lee die on 6.5 Man Bun when loading long projectiles.
No idea why it is happening on 9mm.

 

[Rockzilla]

Plated bullets, may be thinner than normal. Bad batch etc.

Seating stem ..check to make sure its clean, make sure no plating from bullets in it. Take the stem out, place it over the loaded round, to see if the marks kinda line up, try a different jacketed bullet,, not plated to see if it still happens, could also be applying some crimp *taper* while seating, if you use the seater to crimp also.die adjustments..replace stem if necessary

-Rock

 

[85MikeTPI]

Yes, plated bullets and resistance seating. Did you ream and/or flare the brass like you would for cast? I treat plated just like cast FWIW..

 

[BFMIN]

Needs more flare?

 

[outrider58]

Needs more flare?

I sure do...

 

[RFBfromDE]

Needs more flare?

I sure do...

Here you go…

 

[Coehorn]

I don't like talking about my flair.

 

[Rockzilla]

Yes, plated bullets and resistance seating. Did you ream and/or flare the brass like you would for cast? I treat plated just like cast FWIW..

I forgot to add that...thank you sir.
Yep, treat plated as cast, that's where the
Lyman "M" die comes in handy also and a slight ream of the case mouth...
Those are just givens here, when cast bullets / plated. A slight ream of the
case mouth with "flat base" bullets

-Rock

 

[RFBfromDE]

Here you go…

@Sunrise

You are needed in isle six!

 

[Biggfoot44]

Presuming it is actual same batch of bullets as previous , then yes something changed requiring more seating force .

Moat likely the adjustment of case expander shifted .

 

[Amagalous]

Yes, I took the die apart, cleaned everything, put a little dry lube and reassembled. The strange part was that I set up this round a few days ago. Loaded like 200 rounds with no issues. Came back 2 days later to finish the batch, and this was happening. All the cases were properly flared. It was like the reloading fairies came in during the night and messed wtih things. Maybe I need to make an offering to the carbon gods this weekend! Thanks all!

 

[John from MD]

If you plan to use lead bullets a lot, I suggest that you modify the seater stem for each bullet you use. It is easy to do by putting some JB Weld in the nose of the stem and then pushing a bullet into it and holding it there until the JB Weld hardens. This is easily done in a small vise or even with carpenters clamps. You will never have a damaged bullet, (at least when seating) again.

 

[Rockzilla]

You can buy different bullet stems, round nose, SWC, WC, etc. Think Lee even can make custom ones you supply the bullet. Whidden sells em and others


Pretty much use MightyArmory seat dies for the 9mm / 45acp

Mighty Armory 9MM Seating Die

Get the world's toughest reloading dies with Mighty Armory. The Seating Die seats all 9mm projectile shapes, is 100% universal and easy to setup and adjust.

www.mightyarmory.com

-Rock

 

[Sunrise]

@Sunrise

You are needed in isle six!

LMAO!

"It's live and in color!"

 

[BFMIN]

Wouldn't doing that (pushing bullets into JB & waiting) simply irrevocably epoxy the bullet into the seating stem?

 

[John from MD]

Wouldn't doing that (pushing bullets into JB & waiting) simply irrevocably epoxy the bullet into the seating stem?

I have never had the JB stick to a bare lead bullet. It must have something to do with the make up of the lead. I guess you can rub some wax or oil on them prior to doing it if it concerns you.