Making a 284 Win Collet Die

[sharpshooter_308]

Anyone have advice on how or what to use for a Lee collet Die for 284 Win? Will a 7x57 work? 7mm-08 with spacers? I know I will have to modify the mandrel for for neck tension. Just exploring options without having to wait 2 months for a custom die from Lee

Thanks

 

[Patch700]

The base dimensions for the 284 are somewhere at .496" if I recall... You could possibly try a shortened magnum die?? If you aren't bored I would wait the 2 months lol.

Good luck

 

[normmatzen]

Keep on the look-out on ebay for a 284 WIN collet die or do like I did and order a die from Lee.
The normal custom die is for a particular chamber and bullet, so it may be worth while to call them to see what the lead time would be for a plain jane 284 WIN collet die.

 

[Jay Christopherson]

I used a 7MM-08 collet die and brazed an extension onto it for my .284.

 

[sharpshooter_308]

Thanks for the info.

 

[Ringostar]

The 284 case fits the 7x57 Mauser die.

 

[357Mag]

Sharpshooter -

Howdy !


Say.... those LEE Collet NS dies are machined w/ generous internal diameters.
The case walls do not contact the inside of the die. They hold the sizing to the neck walls via use of the mandrel and collet set-up.

Medium-capacity case' dies that I've measured are WSSM diameter from the git-go.

Since the shoulder angle itself is not a huge factor in the successful operation & use of these dies;
you can use other 7mm LEE collet NS die(s). I'd have to take a look @ what is currently offered, to know fer sher.

My point:
Based on case oal, a 7mm-08 die body seems to me like it should work ?
You'd have to check-out the sliding internal sleeve, which needs about .1" of travel after shellholder contact, in-order for the squeeze down function to work.


With regards,
357Mag

 

[sharpshooter_308]

Thanks. They do make one for 7x57 who's case is 3mm longer. Or I may try the 7-08 since I have one anyway. Either way, wouldn't be out a lot of money and could prob get either one to work with some tinkering

 

[357Mag]

SHarpshooter -

Correction to previous response I made.

Case is positioned inside a sliding " collet ", that moves vertically into a nested position in a " sleeve".
The collets and sleeves are usually case-specific, a concession to Lee's use of only 5 different die bodies to cover their entire spectrum collet dies offered.

The " collets " have a upper end access hole, that accomodates the sizing mandrels.
These bore diameters are larger than the typical OD of the case' necks in question.
Because of this, other different calibre collets ( different than the case you have in-mind ) might also work ( say.... a collet from a 6.5mm case in-lieu of using a " 7mm " ).
In testing, a 6PPC collet very nearly accomodated 6.8SPC cases w/ .013" neck wall thickness ).

FWIW.

With regards,
357Mag

 

[Joe R]

357Mag said:

SHarpshooter -

Correction to previous response I made.

Case is positioned inside a sliding " collet ", that moves vertically into a nested position in a " sleeve".
The collets and sleeves are usually case-specific, .....

Hi 357Mag,
I don't mean to hijack the thread, and if happen to offend anyone please let me know and I will start a new thread.

I am in the process of fireforming some .243 brass that will become a 6mm Competition Match. The only difference is that the 6CM has the shoulders blown out to 31 degrees (see picture below). I was planning on using a regular .243 Lee collet die (LCD). Are you saying that I won't be able to use it? And I will have to have a custom one made by Lee?

Jay,
your advice would also be appreciated.

Kindest regards,

Joe