510 WSM - Thoughts?

[fireball168]

I chucked up a couple of 300 WSM cases last night, ran the end mill in until the shoulder was gone. Ended up with a case 1.625" long with a .508 inside diameter.

Thinking of stuffing mil-surp and Lehigh hunting bullets in it. Hopefully they'll show up tomorrow.

Anybody tried this combo? Look like a slightly oversized 50 EBG(see a couple of posts down). Neck diameter closely matches the base diameter of the 458 Socom, so should have some additional capacity with the girth and added length.

What does Hornady charge for custom dies now???

[Greywuuf]

and decided against it, I went with the .510 whisper (not finished yet)
The drawbacks I can see are the thickness of the brass and the supposedly horrid quality control of available brass. Check out John Noveske's 458 version of the same thing.... either at his site (the name of which escapes me now) or on "shortmags.org" Forum.

On the bright side that is the same (real close) case length as the 6.8 SPC, with short little bullets you could single stack them in an AR mag (maybe... I don't remember if they are too wide, but I know they will go in a FN/FAL mag ;-) )

[fireball168]

Was planning to run the cartridge through a WSM bolt action.

The brass thickness was an attraction to me, figured it would be up for a little additional pressure.

Might have to inside ream a bit of the neck, will try to seat a bullet tonight and measure the O.D. of the neck.

It was a .458 Noveske as I recall....

[Spook]

Fireball, I started with the wsm cases when I ended up with the EBG. The problem I ran into was case wall thickness variance. ( section a couple) The brass was as thin as .008 in the shoulder of a few cases . I also tried RUM cases and gave up there too.
That being said Dave @PTG has a print for a 500 rem ultra...so somebody has tried it. Its sheet #3576 if you want to get a copy from Kathleen or Myra.

[fireball168]

I've cut the shoulders clean off these cases. They're once fired 300 WSM's.

So far the 10 I've cut have all been consistent at .0155-.016" neck thickness.

Seating a "new" SA 690g feels pretty good seated to the cann. Can push in by hand until the last .150 or so, then just light pressure with a seating die. No measureable bulging in the case seating them to 3.105".

Which I believe is about .105" too long for a Savage, Remington or Winchester 300 WSM magazine box.

Here's another picture. With a 500A2 with the same bullet for comparison.

[wwbrown]

I was at a gun store in the Twin Cities that was all excited about the round you guys are talking about. I seemed interesting, but I got real annoyed when the guy started to tell me that I could not purchase custom dies, reamer and gauges to build my own as they had a patent app. pending. I have not been back to that store in the Minneaplis suburb since.

They built it off a CZ 98.

wade