So, I have this case, it's a Lapua trimmed to 2 1/3" and necked to 30 cal. for 3.08" COL in a M70 short action.
Out of curiosity, I ran a model of it necked to .416" and .510, and was surprised with what Powley told me.
According to my program, I'd have about 124g of powder and could get about 2400 fps from a 535g, at about 50k CUP, with - get this - an 18" barrel?
[.416" was ~114g water, and 2500 fps 370g North Fork.]
What's more, I only gained about 20 fps per inch.
Someone with QuickLoad please double check for me, would you? This program has limitations.
Here's the specs:
Lapua case, nominal base of ~ .597", body 1.9047" long, necked to .5340" (.5360" at base), .5760" at the shoulder, 35*, 2.3333" long.
Bullet is 535g Woodleigh PP, 1.158" long, COL 3.08", 18" bbl.
While you're at it, try 22" bbl for comparison, please.
Thank you very much in advance.

Does this interest anyone else like it does me? A Model 70 short action, 18" bbl, breech dia to match front ring, straight taper to .80" at muzzle, would bring some weight to the thing, and still keep it mostly toward the center. Some lead in the butt for balance and to tune the finished weight to about 12# then you're off to the range!

And before anyone says it won't work, note that the taper is more than the Jeffery, and the difference between shoulder dia and neck dia is greater than the Nyati, so I'm not breaking any new ground here. I still believe the 2 1/2" Rigby case could safely be blown out to neck at .510 with headspace, so a bit easier with 2 1/3" case.

If all you want to shoot is the light bullets you can fit the regular 500 Jeffery in a Mauser length action, you only get one in the regular magazine...
Special attention Jeffeosso: Now that I have a digital camera (got to love X-mas, a digital camera and a box of .416 Remington Safari grade ammo!)I will get with my buddy that has done this and post pics, it will be early next week before I can get with him though. I will also get pics of the mauser triggerguard/BAR magazine hybrid that I promised you about 8 months ago.
Jason

Good point. I like the idea of doing it with 10% less powder, though. It would shoot the 600's just fine, to about 2250, which sounds awefully brutal to me.
Jeffery cases are expensive and rare. The Lapua is just expensive. And with .030" smaller base, you might get another round down without breaking the bank.

I agree with your points, although the rims are the same diameter your are right that the rebated rim Jeffery is a pretty fat little guy in the body. You have to admit that the 500 Jeffery is just a sexy round though! I really think a bigger bolt face then the mauser would be a good idea as well, there really isn't enough there to open up as you will see when I get the pics posted next week.
Jason

Jason,
Thanks for remembering the pics!!!

BTW, all, I am back..

iff my handle and name didn't start out with jeff, I would never have done the 500 jeffe... but it does, and I did.

BB, Shorten a couple cases and send them to me, I'll open them up and send em back.

I do have another opinion on what these bullets should do, honestly... I think they should launch a 600 at 2050 or, better, 2100, and be considered a match for the 500 nitro... from a standard length, and not too cut, mauser action.

jeffe

BB<
I used a 3.25" oal (as that will fit in a mauser with minimal effort), and 124 grains of water (close enough?) on the 510 version.

50,000 psi
18" barrel
woodleigh 535
2172 fps

22" barrel
2258

woodleigh 570
18"
2085

22"
2165

Barnes Solid 600gr
18"
1969

22"
2044

Barnes Orginal 600 gr SP
18"
2023

22"
2099


I see at a projected 50000psi, with 124 grains, barely matching the 500 nitro, rather than 500 jeffery factory loads... BOTH a great...

jeffe

22"

and, just for giggles, I ran upthe 600gr orignal to 60k psi...

it only picked up ~65fps...

the 535 picked up
155fps, for the 10k psi

jeffe

Thanks, Jeffe. Send me PM me your address, nd I'll take you up on that.
Why stick to 50k psi in a modern action with modern powders?
Hasn't the 416 Rem been doing fine for 10 years in Africa at 62-64k?
And with this minimal taper I expect a bit less bolt thrust.
I do think the 22" bl is more sane, considering muzzle blast alone. And still right handy. Have to choose between a 416 or a 50. 416 more useable.
I'd love to keep it around 11#, and the recoil at 535/2400 will be monstrous, so less may be more. I'm not a PH, so th 50 would really be just for fun, and for hurting my friends.
The 416 @ 11#, w fastest 350 could be a mean bear gun.

Does Lapua make brass for the 500 Jeffery, or are you talking about using the 338 Lapua case. It being .584" vs. the .597" base you posted, I'm thinking they make the 500 stuff to?


Here's a pic of the full length 30-338 Lapua Imp I just had finished. The shorter ones are two versions a friend sent me that he did. My brother just got some Horneber 500 Jeffery brass for his new rifle, and I have form dies hat might work to form a short version, as they take a sleeve up to the 40 degree shoulder they form, which is used for the dead stop. All I'd need it a new sleeve for the Jeffery size case. I like the idea too.

http://www.hunt101.com/showphoto.php?photo=79361&sort=7&thecat=500&password=

Oops, sorry Brent. That's just my chubby-ass fingers.
I have three sources that give a nominal .5870" at the base.
That's what I was going off of.
The pic is the 30 Phil, right?
Very close to my original idea for this case, but w/shorter COL. I'm planning on as close to 3.1" as a rechambered M70 WSM will let me. If the 24" bbl allows me any insight into how it will perform with a real barrel on it, I'll rebarrel with 28".

My virgin 338 Lapua brass measured .584", so the reamer was spec'd according to this, I can't remember what the manuals say on it tho. Another guy I know, his measured .584" too. The general base diameter I came up with before I decided to have the reamer ground to .585" at .250" up from the base was at or slightly over .584". The .585" measurement was taken not at the standard .200" up from the base, but rather .250" up.

The pix are of the 30 Phil. Phil used 416 Rigby brass on it though, base on it is slightly larger than the Lapua.

What's the perormance of those little jewels? How long is the barrel, COL?
I think I'll have this first chamber on the standard barrel throated for a few average 165-185 BT hunting bullets, then on the longer bbl look at more like 190-220 BT/VLD's.
My wife is going to kill me.

I'm not sure of the details, do you have Phil's email? He could tell you the particulars on the 30 Phil, I honestly don't remember.

I'm getting 3250 fps from the 210 JLK and Berger with the full length version using Retumbo. I'm also getting 3400 fps with the 178 A-Max at about 55-57,000 psi on the Oehler M43, so i could get 3500 or more, I'll test more with it soon just to see. Mine's a 30.5" 3 groove Lilja, 11 twist.

Here's the latest groups I shot with it.

http://www.hunt101.com/showphoto.php?photo=82744&sort=7&thecat=500&password=

http://www.hunt101.com/showphoto.php?photo=82727&size=big&password=&sort=7&thecat=500