• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

Lee Collet Die question

moondog

Gold $$ Contributor
I'm thinking of trying a Lee collet die for my 6BRA. They don't offer it though.
So, my question is, could I use a Dasher or 6BR version?
 
243 Win- Takes 25 lbs pressure (measured) on my Rockchucker handle to size the neck enough to hold a bullet. Using Lee instructions. There are other methods, that may work better?

To much "exercise" for me.

https://support.leeprecision.net/en/search?query=Collet+die

If you’re a long-time user of Lee Collet Neck Sizing Die you may notice we have modified the Collet so a small portion of the neck protrudes through the end of the Collet-Sizing portion. This often-requested modification was implemented in 2019.

This change allows the portion of the neck that protrudes above the Collet to remain in its fire formed condition. This provides a natural flare to the case neck allowing easy and concentric seating of bullets. This is especially important when seating cast bullets or low drag coated bullets.

Noted author and cartridge designer M. L. McPherson has suggested this modification for years for its ease of use, better function and improved accuracy
 
243 Win- Takes 25 lbs pressure (measured) on my Rockchucker handle to size the neck enough to hold a bullet. Using Lee instructions. There are other methods, that may work better?

To much "exercise" for me.

https://support.leeprecision.net/en/search?query=Collet+die
In the past, when I used collet dies a lot, I would adjust the die down a little at a time from first contact of the sleeve with the shell holder until I felt a slight toggling using my Rock Chucker. This is press specific since some presses are apparently set up so that the ram backs down a bit at the end of the stroke. If you want more neck tension with a collet die, you can sand the mandrel down a bit or order a smaller mandrel from Lee. I have done the former working carefully using a corded drill, folding some 320 grit wet and dry around the mandrel. For unturned necks, the combination of a properly adjusted body die and collet die does a very good job.
 
In the past, when I used collet dies a lot, I would adjust the die down a little at a time from first contact of the sleeve with the shell holder until I felt a slight toggling using my Rock Chucker. This is press specific since some presses are apparently set up so that the ram backs down a bit at the end of the stroke. If you want more neck tension with a collet die, you can sand the mandrel down a bit or order a smaller mandrel from Lee. I have done the former working carefully using a corded drill, folding some 320 grit wet and dry around the mandrel. For unturned necks, the combination of a properly adjusted body die and collet die does a very good job.

I did the same. Slight cam over with the Rockchucker. Very consistent sizing and neck tension.
 
I have sized .222 cases in my .223 die. It sizes about half the neck which is fine by me!

Hip
I did it that way for a long time with a 357 Herrett. For some reason that escapes me now I got a barrel and only had a seating die so used a 35 Rem LCD to size the half the neck, it worked fine for a long time until picking up a FL die.
 
In the past, when I used collet dies a lot, I would adjust the die down a little at a time from first contact of the sleeve with the shell holder until I felt a slight toggling using my Rock Chucker. This is press specific since some presses are apparently set up so that the ram backs down a bit at the end of the stroke. If you want more neck tension with a collet die, you can sand the mandrel down a bit or order a smaller mandrel from Lee. I have done the former working carefully using a corded drill, folding some 320 grit wet and dry around the mandrel. For unturned necks, the combination of a properly adjusted body die and collet die does a very good job.
This is what I did with a Lee 303 Brit neck sizing die. The mandrel came .308, I took it down to .3065-ish. Before sanding the mandrel, you could push a bullet into the sized neck with your fingers. I'm also using a rock chucker.

Plus, annealing the cases helps reduce spring back.

To be fair to Lee, the 303 bullets I'm using measured .3105, not the standard .312

One word of advice, if you reduce the mandrel size, reduce it all the way to the end, otherwise it'll act like an expander button. It took me a few seconds to figure out why I was feeling a drag as I lowered the ram.
 
They make a 6 ARC collet die, can buy it individually or with a seater. Measure your case length to the beginning of the neck and compare to the ARC spec. Hopefully be close enough to work.
 
I just looked and the ARC is .018 longer so I d guess it ll size enough of your neck to work. Just make sure the main die body diameter will accept the fatter 6BR case. I could check mine if you can’t determine that.
 
Keep your eye out for a 6PPC die on eBay. They are discontinued but you see them from time to time. I bought one specifically to neck size 6BRA cases to send in to Harrell Precision with a die order. The die will work for PPC, BR and BRA.
One thing to be aware of concerning the Lee 6mm PPC collet die, the part number and UPC for that discontinued die has been recycled (reused) by Lee; the identifiers now refer to an Auto Breach Lock Pro Shell Plate #14. I found this out the hard way, I ordered a die figuring it was New-Old-Stock (NOS), I got a shell holder instead. The dealer is refunding the purchase. According to the dealer this has been going on for some time. Unfortunately the stock pictures used in online ads may indicate the incorrect product.

Incidentally, if anyone needs an Auto Breach Shell Holder...:)
 
Curiosity killed the cat …. Anyway, just ran a 6 GT and 6 CM case up into my 6 ARC collet die, the body diameter fits fine!!

I think you ll be able to neck size your 6 BRA case just fine.

Good luck!
 
This is my opinion of the Lee Collet Die. CRAP!

I sized 6 new Lapua brass - all OK - but this happened to the 7th.

Also the mandrel was over size.
 

Attachments

  • LeeColletDie.jpg
    LeeColletDie.jpg
    245.7 KB · Views: 49

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
167,691
Messages
2,238,233
Members
80,674
Latest member
Narcan
Back
Top