What 338NM dies

[M77]

I've got a factory 338NM conversion for my DT SRS A1 , I have 3 firings on my New Norma Cases when the problems started .

Sticky extraction no matter what load from mild to warm .

Currently using Forster FLS dies bumping the shoulders 2 thou for clearance and reliability .

Rounds will chamber no problems no resistance , once fired will stick .

Made sure to clean chamber with brush etc , so rule that out .

There's a few discussions where some dies will simply not size enough of the Web down the bottom of the case .

Stuck cases aren't full jammed but literally on the end only


Pics below showing unsized portion

 

[want2learn]

I would, after calling them, recommend sending your die(s) back to Forster along with a few fired cases and the shell holder. They can custom hone the die...i did this recently and it worked well. The fee was quite reasonable.

 

[Steel head]

My buddy recently went through this on his 338 with brass on it with 4 firings.
Norma brass.

We checked trim length and it was GTG but I had him bring some brass with 1 firing he also had, loaded it with same load and it was GTG.

When I get back I’m going to anneal the other lot to see if that fixes it.

I suspect It’s not sizing fully and/or the hard brass is not springing back after firing because of its hardness.

 

[M77]

I will add that I anneal after every firing with the AMP ,

 

[M77]

Got a response from Forster , and tbh not the best one .
They recommend "bumping" the shoulders more being a magnum .
And to also anneal , which I am already doing

At $5 a piece I certainly don't want to meet old friend case head seperation .

 

[Steel head]

Got a response from Forster , and tbh not the best one .
They recommend "bumping" the shoulders more being a magnum .
And to also anneal , which I am already doing

At $5 a piece I certainly don't want to meet old friend case head seperation.

Interesting.
Maybe go three thousandths.

Common bump for gassers without separation problems.