Is this normal when forming 6mm SLR brass?

[evilsvt]

I'm having a 6mm SLR built right now and decided to run a couple of pieces of brass through the sizing die to get an idea but the brass comes out with a "wavy" shoulder. The shoulder isn't perfectly flat and I can feel/see some high spots. I'm running winchester brass and redding Type S bushing die and imperial sizing lube.

Is this normal?

 

[turbo54]

Mine doesn't.

What is your datum length before and after sizing, and what lube are you using?

ETA: Just saw you are using imperial, which works well. Be sure you're not overapplying lube. Yes, the neck/shoulder needs good coverage, but doesn't require a lot.

 

[xdeano]

Mine doesn't either. Can you shoot a picture of what exactly the fired brass looks like so we can see exactly the issue. It should come out clean and sharp.

xdeano

 

[evilsvt]

here's the brass

I tried with and without the neck bushing, i've tried it with the die adjusted at all depths

 

[evilsvt]

ive been playing withe sizing die and to get the shoulder to form sharply I have to crank the die down to the point where it's bulgeing the around the shoulder/body juncture

 

[demolitionman]

Maybe try aerosol spray lube like One Shot. I seem to do much better at not over lubing with One Shot. Guys here on the HIDE got me onto it, and I haven't dented a shoulder since. . . . fyi, I chronically had case shoulder denting issues as well as barely noticeable wavy shoulders. Thank god those days are gone.

 

[turbo54]

That looks like @$$.

Wish I could be more helpful...but either your die is FUBAR or you're fucking it up.

Here is a pic of 243win, 6.5slr and 7slr. Not fired in an SLR chamber yet, just sized and bullet seated:

 

[evilsvt]

the dies have to be fubared, the only way to get the shoulder to form is to set the die past it touching the shell holder which is causing a ring to form around the shoulder/body. I've tried it with the bushing, no bushing, expander ball, no expander ball

 

[demolitionman]

Your pic is hard to discern.

Here is the extreme of what I had going on. Is this kind of what you have going on?

 

[evilsvt]

here is another pic

the case on the left is with the die adjusted down to the shell holder on my co-ax and you'll see the shoulder isn't quite perfect. The right case is with the die adjusted down past touching the shell holder but the shoulder is correct but there is a ring around the body/shoulder juncture.

 

[xdeano]

That slight ring around the shoulder/body junction is fine. It will blow out and it wont hurt a thing including load development. I had that happen on several of my remington 243 brass ehen forming the slr. No problems there. Just make sure they fit the.chamber and go shoot.
Xdeano

 

[1lnbrdg]

Anyone have a SLR reamer I can borrow?

My 6MM barrel should arrive within the next couple of weeks.

 

[turbo54]

The ring below the shoulder seems to be caused by a combination of inadequate lubrication and cycling the press too fast.

I also got those, but stopped once I began actuating the press more slowly and smoothly.

 

[evilsvt]

thank you for the tip. what are you doing for neck sizing? I don't want to have to reset my die everytime. I'm thinking about biting the bullet and buying another fl die and set it up for neck sizing

 

[former naval person]

I tthink that part of your problem is forming with a bushing die. That renders an imperfect fit at that location.

 

[oldfatguy]

thank you for the tip. what are you doing for neck sizing? I don't want to have to reset my die everytime. I'm thinking about biting the bullet and buying another fl die and set it up for neck sizing

Maybe a Lee collet neck sizing die?

OFG

 

[my human host]

I'd recommend waiting for your rifle and setting your dies for a very light crush fit to the chamber. You might find it's a non issue.