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.

http://i41.photobucket.com/albums/e281/fireball168/DSC04318.jpg

[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

[Slug]

Been thinking about this as well and looking at different cases to try that are somewhat affordable to start with.
SSK 510 Whisper starts with 460 Weatherby Magnum brass way too much money
500 Battleship starts with 416 Rigby brass, same thing there as well.

There has got to be a Short Magnum or other case that will work that is affordable.

[fireball168]

It all depends on what you're wanting to do....

Since posting this, I've build a somewhat modified 50 EBG(based on 458 SOCOM), and this little gem I'm calling the 500 BFG, which is a shortened up 500 Jeffery to 1.620".

The SOCOM brass is about .75 each. The Jeffery brass is about the same as the Weatherby at $2+ a pop - but with a marked difference in case capacity due to the difference in base diameter.

[fireball168]

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

Riiiigggghhhhtttttt.

[Slug]

Fireball, What I would like to do is take my Rem long action in 300 Mag, pull the barrel, install a 50 cal, make cases from the WSM line, and have it all fit in a 5 round AICS 300WM magazine as far as OAL and have a 500 Whisper in an AICS stock with magazines. Just trying to find out if someone has done it with the WSM line of cases. Affordable, fit my bolt face, and can reload farily affordable. I picked up 500 API pulled rounds for 20 cent apiece and should make for some fun.

[fireball168]

This evening I shortened up my dummy cartridge to 3.015". This with a SA 650g projectile.

It fits and FEEDS in a Winchester 70 WSM action.

Unsure of how it would perform in a long action Remington, but for what you can pick up these push feed WSM's.....I'd go shopping.

I may go ahead with this project, I'm REALLY surprised that it feeds.

[Slug]

Any updates on this? Been trying to sort out my 300-221 gas piston project and haven't had the time to work on this yet. Still thinking about it though. It would be a hell of a good cartridge.

[fireball168]

I bought some 50 Alaskan brass a month or so ago.

Had Kiff grind me a toolbit that matches the extractor groove in the WSM series.

Takes about 30 seconds to turn the rim off and cut an extractor groove in the Alaskan brass.

Trim to desired length and go at it.

Its really nothing more than a lengthened 50 EBG/SOCOM, as I can run those cases through the respective dies and have an exact replica.

But you've got a lot of additional case capacity available due to the length if you so desire.

[ohnomrbillk]

sorry for the resurrection of an old post. Tag for an idea.

[Ned christiansen]

.510 Whisper is made from .338 Lapua Magnum. I found the Norma brass to be amazingly consistent in wall thickness even down there below the original neck.

The Whisper is interesting in that the shoulder and neck are not formed in, they are machined in. In other words, the interior of the case does not follow the outer, bottle-necked contour. The case wall just gets thinner at the neck.... part of why they are hard to make and thus not cheap, but JD Jones had his reasons for this and I think it is a clever design.

[redtazdog]

.510 Whisper is made from .338 Lapua Magnum. I found the Norma brass to be amazingly consistent in wall thickness even down there below the original neck.

The Whisper is interesting in that the shoulder and neck are not formed in, they are machined in. In other words, the interior of the case does not follow the outer, bottle-necked contour. The case wall just gets thinner at the neck.... part of why they are hard to make and thus not cheap, but JD Jones had his reasons for this and I think it is a clever design.
I use the 338 Lapua brass and they seem to last along time as I have
over 20 loadings with one batch of 100 pc's.
If you have a lathe they are easy to make
JD told me they will last forever for the 510 Whisper

[ohnomrbillk]

I have a Siamese Mauser action, a Ruger No. 1, and a Savage single shot precision target action. I'm strongly considering the unmodified 50 Alaskan case from Starline for both the price of brass, and not having to mess with neck turning or other case modifications. Hornady has dies on the shelf.

I'm hoping to make the savage work, but if I can't the other two are proven on rimmed cartridges. I suppose I would only be out a savage bolt head to try it. Input appreciated.