Odd question about 338-06 AI dies.

[Finch0351]

So I have a 338-06 Ackley Improved on the way in a Ruger m77 Mannlicher i won cheap online. I've been reloading for about a year and have a good understanding of the basics. I plan on stretching 30-06 brass and then fire forming. Here's my questions. Since i will only be neck sizing can I simply use the 338win mag sizer to neck up and deprime? Also can i use the 338wm seating die? Has anyone tried? What do i have to lose? Also is it worth having a custom set made for my chamber? Should i buy just a neck die and a seater? I'm a little bit in over my head but having a **** fine time. All knowledge and experience graciously accepted.

 

[MagnumManiac]

Firstly, the 338WM dies will NOT function correctly for what you're trying to do, the WM case is not only fatter but also longer.

I recommend you buy a set of 338-06AI Redding Deluxe dies, they come with FL, NECK & Seater dies.

I have a 338-06 myself, I simply run the 06 cases into the FL die to open the neck, load then shoot with my chosen load.
I also run a few Improved cases, I fireform using Universal, TP (toilet paper), COW and soap or wax to seal while transporting.
YouTube has plenty of video relating to this technique of fireforming.

I also recommend you have the headspace checked by a competent gunsmith, all AI chambers should have .003-.005" NEGATIVE head clearance to the datum on UNFIRED PARENT BRASS.

Cheers.